When many mobs are loaded, mobs freeze and then game crashes

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
I was going to feed my chickens and cows as normal.

What actually happened was...:
Describe what happened here
During feeding, all the mobs (animals) froze in their place and then the game crashed moments later.

Steps to Reproduce:
1. Have many mobs near player/loaded
2. Game will eventually freeze and crash
3. ...