PP 51-52 of paperback: Tobias describes how he acquired and morphed his cat Dude. When he started to morph his cat, his cat went nuts and clawed him up pretty good.
Tobias: I had fur, Jake. And I was growing claws. You should have seen the real Dude. He went nuts. I had to put him outside before I could morph all the way. He clawed me up pretty good.
Tobias then stuck a sliced finger into his mouth. Why didn't the morphing and demorphing process heal the injuries inflicted by his cat?