It's impossible to know. We humans don't know what goes through the minds of animals, and suicide means taking one's life purposefully. Although Животные might appear to die in ways that look a lot like suicide, it's impossible to know whether или not it was intentional. ...Wow, I really am a nerd, aren't I? *puffs out chest proudly*
Животные have feelings too, so of course they can. The only thing is that humans, who are also Животные by the way, are the only ones stupid enough to actually do it by giving ourselves problems other than survival.
