Animal sentience: The science and its implications, with particular reference to farmed animals

There is an increasing amount of scientific research into animal sentience. Many scientists are studying the cognitive, emotional, and communicative capacities of a range of animals. The results of this research have led to a number of legal recognitions of the sentience of a range of animals. In 1997, the European Union (EU) gave legal recognition to the sentience of animals and updated and elevated this recognition in the Treaty of Lisbon. Other countries and states as well as the World Organization for Animal Health (WOAH, formerly OIE) have followed it. Scientists are increasingly acknowledging that sentience and emotion have arisen in a wide range of species. Research now emphasizes that there is an extraordinary variation in how different animal species (such as mammals, birds, fish, or insects) perceive the world and their environment. This paper looks at the sentience of the main farmed land and aquatic animals and the implications of this for how such animals are bred and housed. The paper concludes that intensive farming systems deprive animals of opportunities for positive emotions, such as play, exploration, social interaction, and feeding to satiation, and stops them from satisfying naturally motivated behaviors. To truly respect animal sentience, production systems should be designed with the animal's characteristics and needs in mind. The authors conclude that regenerative, agroecological, or organic farming systems better protect and respect the sentience of animals leading to less suffering and more opportunities for positive experiences.