Ok now this is just a basic to show what gets eaten/destroyed by what!

Grass-Sheep-Wolf-Steve-Zombie-Skellie-Creeper-Steve(again)-Zombie etc.

Cow-Steve-Herobrine-Notch-Game Bugs (Note- This does not repeat)

Chicken-Ocelot-Fish(Domestication)-Bugs-Jebb-Herobrine (Note-Also not repeating)

Steve-Multiplayer account-Lagg-Griefers-Admins-Owner-Herobrine (Note-not repeating again :P)

Server-n00b with world edit-Pro-Admin-Owner-Lagg-Plugins-Hackers-Herobrine

LOL just a few jokes to make you guys laugh (Note-Hope it worked)

(Note-I should stop noting)
(Note-AAAA THOSE WHITE EYES!!!!)