Animal behavior and stress is a little more complicated than that. Not having to worry about predators, be low on food, or get sick/injured also significantly r

Animal behavior and stress is a little more complicated than that. Not having to worry about predators, be low on food, or get sick/injured also significantly reduces stress. Some animals need a lot of territory to roam and don't do well in captivity, some don't really care. I'm not saying zoos are perfect, but well-run ones are far from evil either. Calling it 'terrible circumstances' is too broad. Sometimes yes, sometimes no.