Perfect on pvp servers. They can lockpick doors from the inside if only they can fit and also when it is on your shoulder it can throw poop at enemies and blind them and can stop them from sprinting so it is good for taming and fighting.
These dudes are quite useful. But even more useful in multiplayer. If you manage to get them inside a base they can unlock doors during raids. And they can throw poop! You can also equip them with hats which looks better on them than hoomans.