...this seems to somewhat have derailed from animals eating other animals, to include their own kind, to debating between human cannibalism. No, it's not a good thing. But animals cannibalize constantly, even their own young, for the simple fact that they're hungry, there's not enough food for the young, they're stressed, they don't know what to do, or plain just go for it and leave the bulk of the bodies behind to rot.
Children can indeed learn a lot from this game, but again, it wouldn't be graphic or anything. Hell, Viva Pinata had you feeding them to each other. And that game was definitely geared towards children (at first). It didn't catch on because it was too difficult a game for many at the age that would enjoy the colorful beasties.
This game is very similar (albeit no candy or unlimited lifespans/no genetic problems from inbreeding) so having a similar feeding shouldn't be such a big deal.