The poor bird! I didn't realize they had such unusual brains!
I hope it recovers. My old cat had a breakdown when our first baby was born, and scratched all the fur off her own head. The vet gave her a tranquilizer, and she lay around in a daze for about a month, while she got used to the invasion of her territory!
Poor Kitty!
I'm sure he's adjusted to space invasion now ;)