In the case of people their suffering matters, but their happiness also matters. The same should be true in the case of animals. "Do I think it's permissible to kill a cow and eat it if it has had a life that's been good and it's killed painlessly? "If people couldn't get adequate nutrition otherwise, then I think yes. read more
There are many animals that kill 'but not for food'. Young animals hunt and kill to learn. They need to learn, even when they are not hungry, so that they will know how to hunt and kill when they are starving. You can see this easily in young cats. It doesn't necessarily go away when they become adults, it just becomes a weaker force, less frequent. read more