Our of 3 chams only one has not been other than for fecal. I think chams are reasonably hardy given near- perfect husbandry. Unfortunately that is a moving target and we are still learning. Also their short life makes it SEEM like they have problems more often as their lifespan is so compressed...
Pelli just did this too! The skin along the top spine persisted forever. And lots of yawning to crack the face. He is so sweet I could not resist peeling a little for him.