Animal Suffering: The Science of Animal Welfare

abnormal behaviour ACTH Adaptation Syndrome adrenal glands aggressive analogies with ourselves Animal Behaviour animal experiences animal suffering animal welfare animal's appear argued argument battery cages behaviour patterns Behaviourists believe birds British Poultry Science captive captive animals cause suffering Chapter chickens chimpanzees choice tests choose concerned conflict damage danger difficulties discussed dogs domestic animals eggs emotional environment Ethology evidence example experiences of animals factors farm animals fish frustration genetic heart rate hens hormones human idea ill-health important indicate suffering individual animals injury intensive junglefowl killing Kruuk large numbers live look mammals mental events mental experiences monkeys natural numbers of animals pain particular pest animals physical health physiological measurements physiological stress pigeons pigs possible preference problem productivity rats Red Junglefowl response scientists seen signs similar Soay Sheep sociobiology species speciesism speciesist subjective experiences subjective feelings symptoms trying welfare of animals well-being wild animals zoos