Oh I think animals are definitely tougher than humans, but I do think animals can feel depression. To what degree, I don’t know.
Did you see this recent story about this goat that was depressed when he was separated from his love?:
http://www.freerepublic.com/focus/chat/3161195/posts
Yeah, I saw that. It was pretty good. This is the good thing about our culture’s increased sensitivity to animals. would they have accommodated the goat 40 or even 30 years ago?