Animal welfare science is a growing interdisciplinary field combining ethology, neuroscience, physiology, and ethics to understand and improve the lives of animals in human care and the wild.
Understanding animal sentience — the capacity for subjective experience including pain, fear, and positive states like pleasure and satisfaction — is the foundation of meaningful welfare improvement. Scientific consensus supports sentience in all vertebrates and growing evidence extends to cephalopod molluscs and decapod crustaceans. Welfare science increasingly focuses not just on minimising suffering but on enabling animals to experience positive states: play, exploration, social bonding, and the satisfaction of natural behaviours. This shift from a negative (absence of suffering) to a positive (presence of good experiences) welfare framework is transforming how farms, zoos, laboratories, and conservation programmes assess and improve animal lives.