Well, for one, it's nice to help out the world around you.

For another, if they're used to being fed, you can catch 'em easier.

[Amos, despite his ability to speak with animals, is not remotely vegeterian. He doesn't like hunting himself (with his talent it feels like cheating) but in his opinion there's a food chain for a reason, and humans are just another predator in it. How the world works, from an animal point of view.]