When certain mobs take damage, the red damage indicator is not displayed properly.

When a sheep takes damage, it's, 'fur' doesn't actually show the red damage indicator; only the face and legs do.

What I expected to happen was...:
The whole sheep turns red like in 1.7

What actually happened was...:
Only the legs and face turned red, the fur didn't

Steps to Reproduce:
1. Hit a sheep with anything