Over 70 billion chickens are farmed and killed each year — more than any other land animal. Here's what welfare science tells us about how they live and suffer.
Modern broiler chickens (raised for meat) are one of the most welfare-compromised animals in existence. Through selective breeding over 50 years, they have been transformed from birds that took 16 weeks to reach market weight to birds that reach it in 33–35 days. This growth rate is so extreme that it causes systemic welfare problems:
Fast-growing broilers' muscles grow faster than their bones can support. Tibial dyschondroplasia (bone growth abnormalities), valgus-varus deformities (twisted legs), and bacterial chondronecrosis cause chronic pain. Studies using pain relief show lame birds walk more normally when pain is managed — confirming they experience pain from lameness.
The heart and lungs of fast-growing broilers cannot keep pace with muscle growth. Sudden Death Syndrome (heart failure), ascites (fluid around the heart and lungs from heart failure), and other cardiovascular disorders affect significant proportions of flocks. These conditions cause suffering and high mortality.
Most broilers are kept at stocking densities of 38–42kg/m² — meaning 20–22 birds per square meter at slaughter weight, with almost no room to move or perform natural behaviors (dust bathing, wing stretching, perching). High density causes respiratory problems, heat stress, and increased injury from pecking.
At high stocking densities with inadequate litter management, birds sit in wet, ammonia-rich litter. This causes hock burns and footpad dermatitis — painful skin ulcers on legs and feet that affect a majority of birds in intensive systems. These injuries are a reliable indicator of housing welfare conditions.
Most commercial broilers are kept in near-continuous dim light (23 hours/day) to maximize feeding time and growth rate. This interferes with normal circadian rhythms and rest behavior. Proper light-dark cycles — now required in EU — improve welfare significantly.
Male chicks of laying breeds are killed at hatcheries (culling). Broiler hatcheries hatch large numbers of low-grade chicks that are killed on arrival. Hatching and transport conditions for chicks that survive can involve long periods without food or water and rough handling.
Laying hens face different welfare challenges centered on the cage vs. cage-free debate:
Like broiler chickens, commercial turkeys have been bred to grow so fast they cannot mate naturally — all commercial turkey production uses artificial insemination. Fast-growing turkeys suffer similar skeletal disorders, cardiovascular disease, and metabolic problems to broiler chickens. They are typically raised in similar intensive conditions.
Ducks are semi-aquatic birds with strong behavioral needs for water — bathing, preening, feeding in water. Most commercial duck farming provides no water access beyond drinking water. Foie gras ducks are force-fed, which is banned in many countries but not all. Duck farming welfare standards are significantly lower than for chickens in most jurisdictions.
Geese are kept primarily for foie gras (in countries where it remains legal) and for feathers (down plucking). Foie gras involves force-feeding — inserting a tube into the esophagus to pump in large quantities of grain — causing liver enlargement (the condition foie gras is derived from), difficulty walking and breathing, and distress. Banned in the UK, Germany, and many other countries.
The Better Chicken Commitment (BCC) is a corporate welfare standard that, if fully implemented by signatories, would represent the most significant improvement to broiler chicken welfare in history. Key requirements:
Over 200 companies have signed the BCC, including major food service companies, retailers, and food brands. Implementation deadlines are 2026–2030. The campaign to secure and implement BCC commitments is one of the most impactful current animal welfare corporate campaigns.
Research has increasingly revealed that chickens are cognitively sophisticated animals — capable of self-control, basic arithmetic, empathy, and complex social relationships. They have distinct personalities, form long-term social bonds, and show distress when separated from companions. Understanding chicken cognition and sentience provides moral weight to welfare improvements: we are not simply improving conditions for simple stimulus-response machines, but for genuinely sentient beings with rich inner lives. See our chicken cognition page for more detail.
The scale of broiler chicken suffering makes poultry welfare one of the highest-impact areas for animal advocates. Your support matters.
💚 Donate Effectively 🐔 Broiler Reform ⚡ Take Action