Vultures can attack from your shoulder, raise melee damage and they act like a 2nd weapon. In addition throwing them at an enemy turns them into a living tracking missile as they seek and destroy your attacker
Vulture base damage is 23 per bite. A rex is 62 damage per bite. So at 300% damage ( which is incredibly easy to get with a vulture ) you essentially have a rex biting from your shoulder every 2-4 seconds. A vulture can get 600%+ damage. In other words, tame two high levels and breed them for nothing but absolutely devastating damage.
Vultures have the ability to keep meats from spoiling a lot longer. Just have the culture Harvest the corpse, as you cannot put the meat on it after the fact, and you should have that prime lasting for quite a while