There has been much speculation over what humanoid pets would be allowed to battle (Argent Squire anyone?) because many of the humanoid pets are children, and Blizzard has long had a policy that children NPCs cannot be killed in the game. So not surprisingly, the number of humanoid pets that can be battle pets are quite limited.
Humanoids recover 8% of their maximum health if they dealt damage this round.
Increased 50% from Undead abilities
Decreased 33% from Critter abilities