Using spawn eggs on passive mobs damages them in stead of making babies

In the PC version if you click on an adult passive mob with it's respective spawn egg a baby is spawned in. (Cow Egg on adult cow spawns baby cow)

In the PE you damage the parent by clicking on them with the spawn egg.

I did see that using eggs currently produces babies roughly 50% of the time so this might no be a bug, but I thought I'd bring it up just in case.