Spawn Baby Animals

What I expected to happen was that when I repeatedly spawn animals from the spawn egg they would be Adults with few baby spawns in between.

What actually happened was that one Adult animal spawned, then a whole bunch of baby animals with some adult animals in between.

Steps to Reproduce:
1. Get an animal spawn egg in creative
2. Hold down the Use Item button
3. One adult animal should spawn, then tons of babies will spawn, and once in a while an adult
would spawn