I hate to bother, but I found a bug in the 1,9,0,3 beta that involves generated animals in unexplored chunks. Every time I pass by an unloaded chunk and reloaded it, I find animals or mobs that are in a breed condition even though I never fed them or even saw them before. Now I have a tamed cat that always have hearts popping out of her, and the funny thing is I have a new kitten every 10 to 15 mins. It is nice to have baby mobs, but I ran out of room for these kittens lol.