File under 'vent': Finally get a grass seed, set up a little animal farm spawn area. Come back a couple hours later, hoping to find a pig, maybe a chicken. Nope! Hi, Mr. Ocelot! Really?
Let's make the best of it, never bothered to tame one in minecraft before. Half a stack of fish later, yay, kitty! Turns out they did too good a job with the sound assets, because my RL cats went a little nuts, jumping on the desk, and generally being pains in the ass until I turned off the sound. Had to exile virtual kitty to the back 40, guarding my mob farm.
Still hoping for a chicken
Do not bother with grass spawning pads, build a mob farm and craft yourself the spawneggs, pig, chicken and squid are easy, but you will need leather for the cow, so thats the only downside, but you generarly dont need leather for too much things. There is a way to get one later on with blood magic.