How will kayden teach him?

I think kayden know how to turn into the cat but problem is he doesn't know how to turn back into human. He just assume that it's his lack of energy (?) that forced him to maintain his cat shape whenever he overused or when he stayed in human form for too long.

I kinda think he just want to do up curtin lolol WHAT IF CURTIN ALSO CAN'T TURN BACK INTO HUMAN I will laugh until I cry