Evidence for sentience in farmed species including pigs, cows, chickens and sheep has grown substantially, strengthening the moral case for significantly better welfare standards.
The scientific case for sentience in farmed species is now robust across the major vertebrate groups. Pigs show cognitive abilities comparable to dogs. Cows demonstrate problem-solving, social bonding and emotional responses. Chickens have complex communication, numerical ability and self-control. Sheep have excellent social memory and form lasting bonds. This evidence base matters enormously for welfare ethics: if these animals have rich inner lives, their suffering is morally significant on a massive scale given the billions of individuals in commercial agriculture. Translating sentience evidence into policy change is the key challenge — and it requires continued advocacy, public engagement and political will.