Animals can't comprehend morality. Humans can. Animals do plenty of things that are immoral for humans, such as infanticide. The "choice" that bears have is totally incomparable to the choice we have. Not only because of the reason above, but also because they can't go to the supermarket and choose their food at leisure. You simply cannot say we should do something just because other animals do it. We wouldn't have made it very far as a species if we did.