You can get a lot of chickens from 1 egg.

So, in Minecraft preview I was experimenting with the new breeze mob and i discovered that if you put 2 in the same boat and throw something in the middle of the 2 breezes you can make a lot of sound. This of course led me to throw an egg in the middle of the 2 breezes resulting in it bouncing rapidly and then at some point spawning 3 or a different number of chickens out of the same egg.