Cats are the most popular companion animal in New Zealand, with 41% of households sharing their home with at least one cat.1 The love and connection we have with these animals are reflected in the comparatively low number of cats used in research, testing and teaching and how they are used.
Many studies involving cats aim to improve their health and comfort in our homes, like surveying their humans to find risk factors for cats becoming overweight.2 However, some cats are still harmed for science; for example, wild cats are used in harmful ways for research aimed at trying to protect native wildlife.
Note: Cats living in the wild are often referred to as feral cats, but we will refer to these animals as wild cats.
Cats have been used in research, testing and teaching in various ways - from non-harmful to cruel and invasive methods. Most cats used for research, testing and teaching purposes are used for basic biological and veterinary research. They are also used in teaching, environmental management and more.
Cats in NZ have been used for:
- Testing pet food formulations.
- Veterinary research, including testing medications for feline diseases, studying disease symptoms and ways of diagnosis (like FIV, tooth decay, and cancer) and researching cat behaviour and health.
- Environmental management, including testing toxic bait and traps, studying wild cat behaviour, optimising management methods (like killing trapped cats) and training staff to handle wild cats.
- Teaching veterinary and vet nurse students basic concepts like animal handling and basic clinical/husbandry skills.
Places that use cats for science in NZ include private companies, universities, and polytechnics.
Cats used for science in NZ are sourced from breeding units, the wild (captured) and other public sources.*
*According to the Ministry for Primary Industries, public sources include: Public donations, animals obtained from a pound, a pet shop or other public sources. This includes companion animals who are used for the duration of the exercise (e.g. veterinary nurse training).
Discover real-life examples of how cats have been used in NZ below!
Measuring thickness of blood vessel walls
Colony cats were anaesthetised, and the blood vessels under their tongue were measured with a special hand-held camera.
Collecting faeces for lab tests
Colony cats were fed different diets for three weeks before their faeces was collected for analyses.
Surveying caregivers on their cat feeding
New Zealand cat caregivers filled in an online survey about their household demographics and what/how they feed their cats.
Testing new toxin in Hawke’s Bay (again)
Toxic bait traps were placed on a property in Hawke’s Bay. Cat population changes were monitored with stationary cameras.
Assessing stress reaction to anaesthesia in cats
Cats were put through several anaesthetic infusions with six-day breaks in between. Regular saliva samples were taken 24 hours before and after, and urine was collected through a wire mesh tray.
Trialling ready-made toxic bait
Toxic bait stations are set up in a regular pattern in an area and left for two weeks. Trial cameras and tracking tunnels monitor the effect on the population.
Studying medical data of cat and dog CT-imaging
Medical data from cats and dogs were gathered, and animals that had been euthanised for other reasons were examined.
Testing if a human diabetes drug might also work in cats
Research cats were placed in individual cages four times (one week each time) and injected with either a diabetes drug or a control solution. Several blood and urine samples were taken.
Testing a cat food supplement for tooth health
Colony cats were anaesthetised, and all plaque was removed from their teeth. Four weeks later, new plaque build-up was measured.
Sampling cats for feline immunodeficiency virus (FIV)
Buccal swabs (inside the cheek) were collected from almost 200 cats at 15 veterinary clinics.
Testing food preferences of cats
Cats were fasted for two hours in the mornings and then presented with different foods (lamb and beef parts) to measure their consumption.
Monitoring wild cats for a year
Wild cats are trapped and fitted with GPS collars. After one year, they are recaptured and killed.
Trialling a lighter rifle to kill trapped wild cats
Captured wild cats were shot in the head using an air rifle and were assessed to confirm death by recording the time to loss of heartbeat.
Testing a predictive marker for cancer survival in cats
Veterinary samples of cats with this form of cancer were analysed and compared with their remaining survival since diagnosis.
Monitoring outdoor cat behaviour
Privately owned cats with outdoor access were fitted with camera and GPS collars for up to three days.
Testing a diagnostic for feline coronavirus
Cats with specific symptoms were used to take blood, tissue, and fluid samples. Some blood samples were taken from control cats.
Studying the genes for hairyness
The hairiness of male and female cattle was rated. Some animals had their rectal temperature taken repeatedly, and some were shut in a hot room for two hours to make them sweat. Eight calves were killed to take brain samples.
Optimising fertility treatment
Young female cattle were treated with different hormonal injections to control their fertility cycle. Around ten rectal ultrasounds were done on each of them within 11 days, and several blood samples were taken in the next month. All but nine were artificially inseminated. The nine animals showed no fertility signs and were therefore useless for the study and the industry.
Trying out a health test for breeding bulls
Breeding bulls were infected with a skin fungus that usually results in a dangerous build-up in the gall and eczema. Through a special diet, bulls can be tested for their reactions via repeated blood samples and ranked for their genetic quality.
Testing a vaccine against miscarriage
Younger and older pregnant cattle were injected with a new vaccine against a parasite or just control solution. Skin reactions to the injection were checked, and blood samples were taken. Farmers reported miscarriages when they happened, and dead foetuses were collected if possible. If female calves were born, blood samples were taken from them, too.
Studying Johne’s disease
Some female calves of a group were infected with bacteria causing life-threatening sickness. Poo samples were collected directly from the rectum of all calves every other month. Half were killed to be dissected at 7 months, the rest at 15 months.
Studying Johne’s disease bacteria
Blood samples were taken from sick dairy cows who were sent to slaughter to see if their immune system was even putting up a fight. After slaughter, organ samples were taken.
Finding a gene to increase casein in milk
Breeding bulls were evaluated on their quality by judging, breeding, and milking their daughters. No exact numbers are stated how many lived to the end of the study (5 lactations).
Testing a new way to treat liver flukes
Young cattle were infected with liver flukes. They were treated with different medications or left untreated. Regular blood samples were taken from all animals for three weeks, and they were killed ten weeks later.
Studying effects of stunning before slaughter
Calves and sheep were anaesthetised. Some got 70-volt shocks to the shoulder. Others had a nerve exposed and stimulated before being stunned or cutting their throat.
Measuring brain reactions to stunning after killing
Calves were fasted for 24 hours and then anaesthetised. They were killed by their throats being cut, followed by stunning while measuring EEG/ECG (electronic heart and brain activity) and blood pressure.
Measuring brain reactions to stunning
Calves were fasted, anaesthetised and stunned with a non-penetrative bolt while being monitored for their response. After measurements were taken, they were killed.
Studying brain reactions to cutting blood vessels or neck tissue
Calves were anaesthetised, and their throat blood vessels exposed. While monitoring the brain“s activity (EEG) and blood pressure, either only the blood vessels or only the neck tissue was cut. The latter animals were then killed, too.
Measuring if being slaughtered is unpleasant
Calves were fasted, anaesthetised, and killed by cutting their throat. EEG and ECG (recording electronic heart and brain activity) were measured with electrodes in the head.
Measuring brain reactions to pain
Twenty calves were fasted and anaesthetised. Their horn buds were removed with a scoop, and pain response of the heart and brain with and without pain blockers.
Testing mastitis treatments
Dairy cows with an udder infection were treated with different antibiotic injections. Milk samples were taken to monitor results.
Trying to clone cows with more valuable milk protein
The genetic material of a cow foetus was manipulated and cloned into several cows. When they were less than one year old, they were injected with hormones to produce milk for sampling.
Analysing Greyhound race injury statistics
Historical data on Greyhound races between 2014 and 2019 were analysed. Injuries and deaths were investigated.
Using bones of euthanised shelter dog
Cadavers of dogs killed at an animal shelter were donated. Holes were drilled into leg bones and fitted with screws.
Investigating farm dogs for four years
Working farms dogs were examined regularly for four years. Health problems and fate were recorded.
Transplanting faeces as diarrhoea treatment
A dog with diarrhoea was treated with laxatives and warm water before a faeces sample from a healthy dog was inserted into his colon. Samples were taken before and after.
Testing the eyes of working dogs
Eye examinations were performed on working sheep dogs. Medication for pupil dilation was given, and faeces samples were taken from most dogs.
Analysing dog movements
Colony dogs were prepared with reflective markers and an activity collar. Their movements on a treadmill at various speeds were recorded.
Testing the effect of diet on farm dog performance
Working dogs were fed a diet very high or very low in carbohydrates. Their blood glucose and activity were monitored three times over four days each.
Testing a parasite treatment
After a pilot study with just one dog, six more were given an experimental parasitic treatment. Regular blood samples were taken through a catheter.
Teaching dogs to smell out catfish
Five pet dogs were trained over several months to identify catfish and goldfish smell in water samples.
Testing different combinations of pain meds
Eight dogs are treated with four different combinations of the test drugs in random order with two-week breaks in between. Two catheters are placed in leg veins (for drug injection and blood samples). For the test, dogs are fasted for 12 hours and anaesthetised. EEG is recorded with electrodes near the brain to measure response to electric shocks. Regular blood samples are taken for 8 hours.
Studying medical data of cat and dog CT-imaging
Medical data from cats and dogs were gathered, and animals that had been euthanised for other reasons were examined.
Teaching dogs to smell out koi carps (2019)
Three pet dogs were trained over several months to identify koi carb smell in water samples.
Testing working dogs for internal parasites
Faeces and blood samples were taken from working farm dogs.
Testing fluid management of dogs during anaesthesia
Dogs were anaesthetised. Their heart activity was measured while hey were injected with calculated amounts of fluid.
Trying to make rat poison unattractive for dogs
Dogs were fasted overnight and then given two food bowls with different kinds of repellent on one of them.
Surveying respiratory disease in racing Greyhounds
Laboratories sent in serum samples of dogs for analysis. Additionally, 17 racing Greyhounds were tested.
Using fish to study the impacts of Climate Change
Fish were either bought or caught and killed so that they could be dissected.
Overfeeding Zebrafish to learn about obesity
Normal and transgenic zebrafish were fed normally or way too much. The fish were taken out of the water for glucose tests and blood samples.
Studying gut bacteria in fish
Nine fish were caught by underwater spearing and killed so that samples could be collected from their digestion tracts.
Studying the sleep of sharks
Sharks were caught and kept in outside tanks. For the experiments, they weren't fed for at least 4 days, of which they spent 3 days in a measuring chamber not much bigger than the shark. Oxygen consumption and behaviour were continuously recorded for the last 24 hours.
Infecting fish larvae as a potential model for humans
Zebrafish larvae were injected with bacteria to test how their immune system responds. This was repeated to test how well the immune system reacted and how long the effect lasts.
Finding a “growth gene” in snappers
Snappers were caught from the wild and bred. Around eighty-thousand of their offspring were hatched and raised. At regular “grading” events, injured and deformed fish were disposed of. At just under a year old, around twenty-two-thousand were left and transported to a sea pen, where they were raised to 17.5 months old before harvesting.
Testing how much fat you can feed fish
Fish in aquaculture were divided into groups and fed diets with different fat content. Fish were anaesthetised and faeces samples squeezed out of them.
Testing fish for mercury contamination
Wild fish were caught, measured and frozen to be analysed.
Measuring how stress affects fish
Fish were exposed to chronic stress for four weeks, while 57 non-stressed animals were kept as a control. Signs of stress were noted. At the end of the experiment, all were chilled to death.
Exposing fish to herbicides
Zebrafish were kept in tanks that were contaminated with different herbicide concentrations for 10 days. They were then mated to herbicide-exposed or control fish. Both generations were tested on behavioural changes at around 4 months of age. 24 fish per treatment were killed and dissected.
Testing supplements as protection from toxins in over 1,000 fish embryos
Embryos were harvested and kept in Petri dishes for toxicity and treatment tests. Embryos were treated with an antioxidant, a gold salt or both on the first day, and abnormal development was measured on day 5.
Studying effects of drying rivers on mudfish
Water depth and quality were measured at 24 different sites. Several traps for fish and invertebrates were set at 8 visits, sampling and mostly killing the caught animals (including 15 individuals of the endangered Kōwaro).
Studying bacterial spread in fish larvae
Bacteria were genetically modified and made fluorescent. Zebrafish were bred, and their larvae were infected with the bacteria. The fish were killed for analyses or used for live imaging under a microscope (and then killed, most likely).
Investigating effects of invasive fish removal
Using fyke nets and electrofishing, fish were caught on four occasions. Fish were marked with fin clippings around one big removal event where 3 tonnes of fish were caught. In recaptures a week after each marking event, invasive fish caught were killed after the examination.
Studying fish life cycles
Fish were sedated and their blood and ovarian tissue were sampled three times.
Developing a model for thermal stress in humans
Guinea pig pups were lightly anaesthetised, connected to devices measuring heart activity and breathing, and wrapped in a temperature-controlling blanket. Their body temperature was either forcefully raised or dropped.
Testing how too much fructose is bad during pregnancy
Female guinea pigs were mated; some were fed additional sugary water until birth. The pups were used for several glucose tolerance tests and X-rays. All pups were killed in the end.
Testing a seizure medicine for preterm babies
Pregnant guinea pigs were induced to give birth early, to test medication on their pups.
Testing the effects of sedatives
Young guinea pigs were treated with different sedatives. Their heart rate and blood pressure were measured before and during each treatment.
Testing an refined way of anaesthesia in guinea pigs
Guinea pigs were made to inhale anaesthetic gases. Different probes were inserted and attached to the animals to measure responses.
Studying the effect of fructose during pregnancy
Guinea pigs were fed either normally or supplemented with fruit sugar before and during pregnancy until birth. Mothers and pups were tested for glucose tolerance.
Studying the effects of meth
Guinea pigs were injected with sedatives, caffeine, and later meth. Under anaesthesia, their livers were cut out before they were killed.
Studying preterm birth effects on the brain
Pregnant guinea pigs were grouped to give birth normally or be induced early. The pups were put through behavioural tests and then killed for dissection.
Studying trauma and treatment of cochlear implants
After destroying their hearing with noise, guinea pigs were fitted with cochlear implants. Treatment success was tested before they were killed.
Testing the measurement of pupil reflexes in Alzheimer’s research
Guinea pigs were repeatedly flashed in the eyes with a phone light to record the pupil responses.
Teaching animal researchers
A range of animals is used to teach researchers handling and experimental methods.
Investigating mechanisms slowing down the heart rate
Young guinea pigs were injected with blood thinner before being anaesthetised and dissected.
Testing a device to assess hearing
Young guinea pigs were anaesthetised, electrodes placed under their skin, and their brain's response to sound was measured. All guinea pigs had one ear damaged, some both ears, before all were killed.
Studying changes in the inner ear due to inflammation
Guinea pigs were injected into the ear with bacteria. Medical scans were done after injecting chemicals, and most were killed for dissection.
Studying the effects of medication on memory
Guinea pigs were force-fed different drugs and later tested in a water maze before some were killed. Another group was exposed to carbon dioxide and decapitated.
Studying how anaesthetics affect intestine movement
Guinea pigs and rats were anaesthetised, then dissected, and then killed, in that order.
Testing a UV treatment for bacterial eye infection
Pigs’ eyes were acquired for testing a new treatment, followed by tests on live mice, most of whom were killed.
Studying methane emission and meat quality
Lambs were tested and killed to assess the relationship between methane emissions, carcass weight and meat quality. Almost 2,000 were put through emission measurements. Over 17,000 were slaughtered.
Testing if anaesthesia affects the sleep–wake cycle
Mice were kept on a 12-hour light/dark cycle and then switched to total darkness. They were anaesthetised twice to see the effect on their activity cycles, and all were killed in the end.
Testing the influences on growth
Transgenic and "normal" mice were kept in small groups and killed at different ages. Fat and muscle tissue were dissected, and the hearts were taken.
Testing a new way to kill lab mice
Mice were fed cream cheese containing different amounts of a sedative. Behaviour was recorded during the sedation period and while gassing them with CO2.
Testing a possible cause for cataracts
Transgenic and "normal" mice were used to study the development of cataracts. They were anaesthetised, images of their eyes were taken, and then they were (likely all) killed.
Studying chronic stress
Mice were handled daily, had vaginal smears, and some were subject to the notorious Forced Swim Test. Half of them were additionally stressed daily in various ways to see the difference it makes.
Trialling cancer drugs in mice after similar drug failed in humans
Mice were force-fed daily with two new drugs in different dosages. Others were force-fed a control solution, and some were left untreated. In the end, the animals were killed with CO2 and dissected.
Testing if exercise influences treatment success with cancer
Mice were injected with cancer cells. When tumours reached an “ethical” limit, they were injected with a labelling agent, anaesthetised and killed to be dissected. This was repeated, while some mice received cancer treatment.
Testing if exercise influences muscle mass with cancer
Mice were injected with cancer cells, and some received immunotherapy once the tumour reached a specific size. When tumours reached an “ethical” limit, they were killed. Cancer-free control mice were killed simultaneously.
Studying the interaction of hormones and stress
Transgenic mice had their brains injected, some had their ovaries removed, and some were restrained for repeated blood samples. In the end, all mice were killed.
Studying movement processing in the brain
Transgenic mice were put through behavioural tests while half of them had a part of their brain-damaged. Some mice had a window put into their skull to take recordings of their brains while awake. They had limited access to water and were forced into a device that stopped them from moving their head. In the end, all were killed.
Testing seizure activity in transgenic mice
Mice with specific genetic limitations were bred. Some were killed for dissection, and others were injected with a gene activation drug before they were killed.
Testing a seizure treatment
Genetically modified mice had wires and a cannula implanted in their brains, and were injected to cause seizures. The next day, their genetic mutation was activated. The test was repeated before they were all killed.
Observing cancer growth with/without treatment
Mice were injected with human breast cancer cells. The growth was monitored and sampled (biopsy). Some were operated on to remove their ovaries and some were treated with drugs before all were killed.
Testing how hormones influence activity while pregnant
Transgenic and “normal” mice were used to test the influence of pregnancy and hormones on activity and anxiety. They were kept in single cages with running wheels and subjected to behavioural tests. The transgenic mice were killed in the end.
Harvesting colon tissue for laboratory tests
Pigs were killed and their colon tissue was used for laboratory testing.
Testing if pigs can be fed by-products from biofuel and food processing
Pigs were fed a standard diet or a diet containing by-products from other industries. They were slaughtered to compare meat growth and quality.
Studying starch digestion in pigs to try and model humans
Pigs were fed different diets containing durum wheat or rice. Some had regular blood samples taken through a catheter. All the animals were killed at the end.
Validating a treatment for stomach muscle dysfunctions
Pigs were anaesthetised, their bellies were opened, and electrodes were placed on their stomach walls before and after damaging some stomach tissue with heat. All pigs were killed.
Assessing pigs as digestion models for humans
Titanium tubes were implanted into pigs’ intestines. Digested food was collected through the tube for 9 hours.
Testing the effect of different species’ milk on brain gene expression
Piglets were fed different kinds of milk from other species for 15 days. They were killed to dissect their brains.
Testing transmitter implantation on wild pigs
Wild pigs were captured, and three different tracking devices were fixed to or implanted into each one. After 104 days, they were tracked down and killed.
Investigating oxygen content in the gut
Pigs were fed diets with different or no protein sources as a control. After a week, all were killed.
Testing a UV treatment for bacterial eye infection
Pigs’ eyes were acquired for testing a new treatment, followed by tests on live mice, most of whom were killed.
Testing the effect of different species’ milk on protein digestion
Piglets were fed different kinds of milk from other species for 15 days. They were killed to dissect their stomachs.
Testing the strain on a temporary surgical implant
A surgical implant was screwed to a severed pig head, and measurements were taken via laser scanning.
Investigating intestine movements
Young pigs and NZ White rabbits were anaesthetised. A part of their intestine was pulled out far enough to record its movements and signalling.
Harvesting rabbit and pig eyes for lab tests
The eyes of slaughtered rabbits and pigs killed for experiments were used to analyse the structure of the cornea.
Harvesting eyes for lab tests
The eyes of pigs and rabbits killed for experiments were used to analyse the structure of the cornea.
Testing a treatment for stomach muscle dysfunctions
Pigs were anaesthetised, their bellies were opened, and electrodes were placed on their stomach walls before and after damaging some stomach tissue with heat. All pigs were killed.
Testing how electric stimulation affects stomach movements
Nine pigs were anaesthetised, their bellies were opened, and electrodes were placed on the stomach walls. Electric stimulation tests were performed before the pigs were killed.
Studying how ageing affects brain chemistry
Rats were kept in germ-free, individual cages before being killed. Their brains were used for tests.
Studying teen binge drinking
Young rats were force-fed alcohol repeatedly. Each time, blood samples were taken, and some were killed to take their brains after each alcohol day. The remaining rats were put through behavioural tests a few months later.
Teaching animal researchers
A range of animals is used to teach researchers handling and experimental methods.
Testing medications for drug addiction
Rats were taught to inject themselves with cocaine when they pressed a lever. Through many cycles of establishment and withdrawal, medications were tested for their effect on drug-seeking behaviour. Other rats were tested for their activity level on cocaine with or without medication. Some were put into water-filled cylinders to examine if medication influences how long they swim.
Testing effects of meth on brain protein
Rats were taught to inject themselves with meth or a saline solution when they pressed a lever. After 20 days, there were two weeks of abstinence. In the end, all were killed to dissect their brains.
Testing new drug formulations
Rats and rabbits were injected with a new anaesthetic, pinching their paw repeatedly to measure reflexes. Rats were giving the medication until they died.
Testing blood pressure drugs against seizures
Rats were implanted with devices to measure heart and brain activity through induced seizures without being anaesthetised. They were killed two days later, and their hearts were taken.
Studying the effect of prolactin on the brain
Virgin rats and rats who recently gave birth had a cannula (tube) placed in their brain and were injected with medication. They were injected with prolactin after two days and killed an hour later to dissect their brains.
Testing a surgical treatment for hypertension with diabetes
Transgenic rats were injected to develop diabetes. Their kidney nerves were surgically destroyed. They were restrained for measurements and sampling regularly. In the end, they were all killed.
Testing a new pain medication
Rats were operated on to cause pain build-up in their hind leg. After 10 days, they were injected with different variations of a drug or just a control solution. The effect was tested by poking their hurting leg and having them balance.
Trying to study depressants and antidepressants
Rats were kept isolated or in groups for nine weeks. They were injected with different drugs and put through behavioural tests (the notorious Forced Swim Test, among others). In the end, all were killed.
Studying how anaesthetics affect intestine movement
Guinea pigs and rats were anaesthetised, then dissected, and then killed, in that order.
Studying hormone sensitivity of the brain
Female rats were mated, gave birth and cared for their babies for three weeks. They had prolactin injected below the skull. They were killed, and their brains were removed.
Harvesting rabbit and rat hearts for lab tests
NZ White rabbits and rats were killed to use their hearts in lab tests.
Testing digestion of a pig food
Rats were fed a pig food and killed to examine their intestines.
Testing how heart calcium metabolism is different in species
Guinea pigs and rats were decapitated, and their hearts were quickly removed to study them.
Investigating how worms spread between lambs and calves
Lambs and calves were infected with worm eggs to see if parasites from cattle can infect sheep.
Using sheep to try and model how well humans will heal after dental surgery
Sheep had healthy teeth pulled out and the sockets treated in different ways to compare how well the body will heal after a tooth is removed when left untreated vs using a bone graft.
Preclinical testing of a gene therapy for Batten disease
Sheep with and without a specific gene mutation were checked and scanned regularly for nine months. Affected sheep received gene therapy at different ages. Treated sheep were killed.
Testing if blocking a cell signal can prevent foetal brain injury
Pregnant sheep were anaesthetised, and the foetuses fitted with electrodes. The umbilical cord was blocked for most of them, and half were treated with a test drug. Mothers and unborn lambs were killed three weeks later.
Testing the combination of drugs for congestive heart failure treatment
Sheep were anaesthetised and subjected to surgery. Electrodes were used to pace their hearts faster while testing the effect of different drugs.
Testing the best way to deliver gene therapy drugs
Sheep were anaesthetised. Their heads were drilled into, and their brains injected with test drugs. They were killed after three weeks.
Testing the potency of pneumonia vaccines for sheep
Lambs were vaccinated twice and regular blood samples were taken for 34 weeks, to test different pneumonia vaccines for sheep.
Testing the effects and wash-out of painkillers
Lambs were treated with different painkillers or no painkillers at all before tail docking and castration. Their behaviour was monitored.
Developing “hyperimmune” milk
Sheep were injected with Covid-19 vaccines to see if they produced milk that could be marketed to consumers as providing immunity against certain diseases.
Studying the genetics of Batten disease on chimeric lambs
Sheep foetuses were removed. After swapping cells between them, they were inserted into other ewes. Lambs born were subjected to X-rays and, at one to three years old, were bled out for dissection.
Testing pacemaker adjustments
After causing them heart failure, sheep were surgically fitted with pacemakers and measurement devices. Those who survived the procedures were killed after six months.
Studying methane emission and meat quality
Lambs were tested and killed to assess the relationship between methane emissions, carcass weight and meat quality. Almost 2,000 were put through emission measurements. Over 17,000 were slaughtered.
Studying the effect of chemicals in normal and high blood pressure
Sheep were surgically fitted with a clip around an artery and compared with others without clips. Measuring devices were added before injecting different chemicals into the hearts of the conscious sheep.
Comparing success of muscle repair surgery with or without weeks of delay
Sheep were anaesthetised and one side of a pelvis muscle was detached. After several weeks, the muscle was repaired. How well the sheep then walked was noted before all were killed.
Comparing different designs of dental implants
Sheep were anaesthetised. One leg bone was exposed and fitted with several implants. After 12 weeks, all were killed.
Trying to model human brain injuries
To study changes in different areas of the brain after brain injuries. Sheep were used to study the effects of traumatic brain injuries in humans.
Investigating intestine movements
Young pigs and NZ White rabbits were anaesthetised. A part of their intestine was pulled out far enough to record its movements and signalling.
Harvesting rabbit and pig eyes for lab tests
The eyes of slaughtered rabbits and pigs killed for experiments were used to analyse the structure of the cornea.
Causing sinusitis in rabbits as a model
NZ White rabbits were anaesthetised, and a sinus tract in their nose was blocked for four weeks to cause sinusitis. After another ten weeks with regular samples, they were killed.
Testing a new vaccine
NZ White rabbits were injected with a new vaccine type several times before being killed.
Harvesting eyes for lab tests
The eyes of pigs and rabbits killed for experiments were used to analyse the structure of the cornea.
Testing the toxicity of some substances
Young NZ White rabbits were force-fed different doses of toxic substances. Blood samples were taken before and immediately after killing them at set time points (or to end their suffering).
Using a new imaging technology
One NZ White rabbit and rats were killed, and their eyes were removed to use for the study.
Measuring contractions in exposed rabbit uteruses
Pregnant rabbits were anaesthetised, and their uterus was exposed. Measurements were taken while contraction-inducing injections were given. Then they were all killed for dissection.
Mapping wave patterns of the small intestine
NZ White rabbits were anaesthetised, their intestines were used for electrode mapping, and then they were killed.
Studying presence of a virus in rabbits
Wild rabbits were shot, caught by dogs or trapped to test them for virus strains. The infectious solution was then fed to NZ White rabbits in a lab to kill them later.
Harvesting rabbit colons for lab tests
NZ White rabbits were anaesthetised, a part of their intestine was cut out, and then they were killed.
Harvesting rabbit bladders for lab tests
NZ White rabbits were anaesthetised, their bladder was cut out, and then they were killed.
Testing an antimicrobial eye medication
NZ White rabbits were treated with Manuka honey solution in one eye and a control solution in the other eye for five days. Different values like tearing and irritation were measured.
Using muscles of dead rabbits for imaging
Two NZ White rabbits were killed to use for detailed muscle imaging.
Measuring jaw bone growth in young rabbits
Young rabbits were anaesthetised and had holes drilled into their jawbones to implant small pieces of metal. X-ray scans were made, and the rabbits were killed.
Testing the welfare impact of pindone toxin
Three groups of young NZ White Rabbits received pindone-toxin pellets on different schedules. Any rabbit still alive after three weeks was killed.
