Continuous babies spawning

The Bug 

In both creative and survival mode, when you spawn in sheep, pigs and cows on a single block from a spawn egg and keep on holding right click, the first sheep, cow or pig will always be an adult, and all the sheep, cows or pigs spawned afterwards will be babies until you let go right click.

How to Reproduce the Bug

• Get a single block, preferably in the sky.

• Get pig, cow, and/or sheep spawn eggs.

• Hold down right click (on trackpad, hold two fingers down) and you will see that the first mob you spawn will be an adult, and all the mobs after will be babies.