Familiars For Witches

Minecraft is a fantasy game, and it has a lot of fantasy mobs, the Warden, zombies, dragons, and more. Every hostile mob in Minecraft is a fantasy creature in fact! And I'm here to propose more, and when I say more, I mean one more, say hello to the familiar, in European folklore familiars are said to be the ghosts of animals, who served witches in the medieval and early modern era. So why not add a mechanic where witches can call upon their familiars to fight for them, I imagine familiars just being retextures of passive/neutral animals like sheep, wolves, cows, pigs, chickens etc, but of course they'd be hostile. I don't know what they would drop, but there would have to be some sort of reward for killing them, they probably would have the same health as the witch, deal as much damage as a zombie, and die once the witch does.