Atheist - // Andy; cows are social animals who live in herds and nurture their young - like antelopes etc. When they are threatened by a predator, they realise what's happening and they run like hell. That is fear, panic, adrenalin etc. Sometimes animals will defend their young against attack, or act out mournful and distressed behaviour after the death of a relative or young one. Elephants do that. Chimpanzees do similar things. Dolphins and whales do similar things. //
I think I did not make myself clear in my posts.
Animals such as the species you mention, are able to understand the 'fight or flight' reaction, because that is inherent in their survival in their normal environments.
My point is, slaughter animals have no experience of the slaughter process, in terms of it frightening them, so that is why I understand that they do not react with fear or distress when another animal is killed near them - it is outwith their usual experiences.