What happens to farm animals
Farm animals are killed in numbers that are hard to hold in mind. More than 86 billion land animals were slaughtered for meat in 2024, and about nine in ten of them were chickens, by UN figures [1]. Those chickens have been bred to grow so fast that in a survey of 51,000 birds in commercial flocks (2008), more than a quarter walked poorly at an average age of 40 days and 3.3% could barely walk at all [2]. Are chickens raised for meat treated humanely? follows them from the shed to the slaughter line.
At slaughter, 90% of pigs in England and Wales were stunned with high-concentration carbon dioxide in 2024, a method the UK government’s own Animal Welfare Committee (2025) says causes pain, respiratory distress and fear before the pigs lose consciousness, and wants prohibited [3]. The answer to Is humane slaughter possible? explains what the gas does and why it is still used.
Free-range and higher-welfare farming can ease an animal’s life but still end it young, and Is humane, free-range meat ethical? sets what the labels promise against what they leave out. The answers below follow each species in turn, from hens and dairy cows to sheep, fish and ducks, then slaughter itself and the animals used in testing, zoos and entertainment.
Chickens and eggs
- Are chickens raised for meat treated humanely?
Most chickens raised for meat are not kept humanely: they are bred to grow so fast that many go lame, and in 2023 the EU’s food safety agency advised at most 11kg of bird per square metre, where EU law allows up to 42kg.
- Are eggs cruel? What happens to hens and male chicks
Egg production kills hens and their brothers: about 6.5 billion male chicks of laying breeds die each year worldwide, by a 2026 estimate RSPCA Australia cites, and hens are slaughtered once laying slows.
- How intelligent are chickens?
Chickens are far from stupid: Lori Marino’s 2017 review found them as cognitively, emotionally and socially complex as most other birds and mammals in many areas. Their number sense is basic, and mostly tested in chicks.
- Is it ethical to eat eggs from your own backyard hens?
Backyard eggs still have costs: hens sold as females were sorted from their brothers, and the egg trade kills about 6.5 billion male chicks a year, by a 2026 estimate RSPCA Australia cites. Heavy laying also weakens hens’ bones.
Cows, dairy and veal
- Is dairy cruel if the cow isn’t killed?
Milk costs the cow her life in the end: dairy cows were 56% of the cows slaughtered in Britain from 2021 to 2025 (AHDB industry figures). In 195 UK herds in 2023, the typical cow left the herd at about six.
- What happens to male calves on dairy farms?
Most veal comes from male dairy calves, born because cows must calve to give milk, then reared for meat, exported or shot young. Ireland exported 203,000 unweaned calves in the first nine months of 2026, its government said.
- Do farm adverts show how animals really live?
Most farm animals live nothing like those in adverts: the Sentience Institute, an animal-advocacy think tank, put 74% of livestock in factory farms in a rough 2019 estimate. Dairy cows typically leave the herd at four to six.
Sheep, wool, leather and fur
- Is wool vegan, and is leather just a by-product?
Wool isn’t vegan, and leather is a by-product that is still sold: in October 2026 a US steer’s hide fetched about $24, under 1% of its price, and all its by-products about 7%, paid to the business that killed it (USDA).
- Do lambs have a good life before slaughter?
A lamb’s life in the fields is real but short: in the UK, the RSPCA says most lambs are slaughtered between 10 weeks and six months old, while Countryfile (2026) puts a sheep’s natural lifespan at 10 to 12 years.
- What is mulesing, and how many sheep die on live export?
Wool is more than a haircut for Australian Merinos: the industry’s Australian Wool Exchange found 60.7% of Merino wool bales in 2025/26 came from mulesed sheep, which had skin cut from their rear as lambs.
- Are fur, silk and down cruel to animals?
Fur, silk and down all come from animals that are killed: the welfare charity RSPCA Australia (2019) estimates about 98% of down and feathers is collected after slaughter, and conventional silk pupae are killed by heat.
Fish
- Do fish feel pain?
Fish very likely feel pain: in studies Lynne Sneddon reviewed in 2015, trout given a painful lip injection went up to 3 hours without food, but ate after 80 minutes if also given a painkiller. Some scientists dispute it.
- How many fish are killed each year, and how?
Fish are killed in the trillions: a 2024 study in the journal Animal Welfare put the wild catch at an average of 1.1 to 2.2 trillion fish a year from 2000 to 2019. Most fish, wild or farmed, die without being stunned.
Ducks, bees, crabs and insects
- Is foie gras cruel?
Foie gras is cruel by design: the EU’s scientific committee on animal welfare (1998) found force-feeding swells a duck’s or goose’s liver to six to ten times its normal size and harms the birds’ welfare.
- Is honey vegan?
Honey isn’t vegan because bees make it as their winter food and beekeepers take it, feeding syrup where stores run short. A 2018 paper in Science warned that high densities of managed honeybees can harm wild pollinators.
- Do insects feel pain?
Many insects can probably feel pain: in a 2022 review by Gibbons et al., adult flies and cockroaches met 6 of 8 pain criteria, more than the crabs and lobsters UK law treats as sentient. Farmed larvae are less studied.
Free-range, humane labels and slaughter
- Is humane, free-range meat ethical?
Free-range and humane farming can ease an animal’s life but still end it young: under a 2008 EU regulation still in force in Great Britain, a free-range chicken can be killed at 56 days old.
- Is humane slaughter possible? How pigs are really killed
So-called humane slaughter still hurts: 90% of pigs in England and Wales were gassed with CO₂ in 2024 (FSA), a method that welfare advisers to the UK government and the EU say causes pain, fear and breathlessness.
- Is halal meat cruel? Religious slaughter and stunning
Slaughter without stunning, for kosher and some halal meat, is no kinder: UK advisers judged the cut very painful (FAWC, 2003), and most cattle stay conscious 5 to 90 seconds (EFSA, 2020). Stunning has its own cruelties.
Testing, zoos and entertainment
- Is animal testing for cosmetics banned?
Cosmetic animal testing is only partly banned: the campaign group Humane Society International counted 45 countries with bans in 2023, and the US has no national ban. EU chemicals law can still demand such tests.
- Do we need animal testing for medicine?
Animal testing is still standard for new medicines, though Ineichen and colleagues (2024) found only 5% of animal-tested therapies won approval. US law stopped requiring it in 2022, and the FDA plans to phase it out.
- How many animals are used in experiments each year?
About 192 million animals were used or bred for science worldwide in 2015, 79.9 million of them in procedures, Cruelty Free International researchers estimated in 2019. Only 37 countries published counts.
- Are zoos and aquariums good for conservation?
Zoos and aquariums have helped save a few species, but most of what they keep is not endangered: Lennon et al. (2026) found under three in ten animals in UK zoos and aquariums belonged to threatened species.
- Are horse racing, riding and circuses cruel to animals?
Racing, competitive riding and circuses use animals for a spectacle they never chose, and the cost is measurable: British racing’s own figures record 192 horses fatally injured in 2025.
Sources
- Our World in Data, from UN Food and Agriculture Organization data, Yearly number of animals slaughtered for meat (2024 figures, updated February 2026) (opens in a new tab) (data)
- Knowles et al. (2008), Leg disorders in broiler chickens: prevalence, risk factors and prevention, PLOS ONE (opens in a new tab) doi:10.1371/journal.pone.0001545 (opens in a new tab) (study)
- Animal Welfare Committee (2025), Opinion on the welfare impacts on pigs of high concentration CO2 gas stunning and of potential alternative stunning methods, UK Government (opens in a new tab) (official)