I, honestly, enjoy hunting for NPC's because I'm usually in mapped roleplays with no little, usually illiterate, animals. So that is another option. Sometimes I get in to a cannibalistic roleplay, and do eat other characters, very simple which one I like best.
I think it would sort of pose a problem to add actual prey to the game, because custom maps would be confusing. As in, how would the animals get in there? Automatically programmed- which could take away from the enviroment, etc. I don't really support that whole add prey to the game.
So my option is pretty clear here, honestly.
From the Shadows ~ Hallucination