Summary:
Equipment (saddles, carpets, armor) on mobs (llamas, horses, donkeys, mules, camels, striders, pigs) flash red when receiving damage. When a player in the armor receives damage, his armor does not blink red.

Steps to reproduce:

1. Summon/find a mob on which you can put on equipment.
2. Put on it equipment.
3. Hit a mob.

Observed results:
While receiving damage, mob flash red along with equipment.

Expected results:
Equipment on the mob will not become red upon receipt of damage (like a player).

Screenshots: