[@KatherinWinter]
	well considering his power is just called Manipulation... so would believe it can work against any kind of living thing, as long as it doesn't have strong enough willpower to resist it, doesn't know exactly how his power works, and if he can activate it at the time, after all you can still trick animals though it is bit harder than the average person. I only say living things because of him having to say the words, if he could just manipulate things with his mind then he'd be able to use things like they was puppets. but in the end guess up to you.