No. The chick did not scalp itself. The tissue from the entire back of the head was missing, no skin flap. The skin was eaten. The mesh wasn't the small gauge. The rooster had a bad habit of biting.
Just because you have a friendly roo, doesn't mean he won't be curious or reactive and injure a chick by accident. Chicks are perfectly safe around roosters until the day something happens to indicate they aren't.
Currently, I have two perfectly well behaved roosters that wouldn't hurt anything. But I don't take the chance that one time one might accidentally hurt a chick. That would be one time too many.
Can you say with complete certainty a lovely roo absolutely wouldn't hurt a chick accidentally?