I’m NO expert, please remember that LBP’s, but that looks very much like Henry’s did when he had mites. I quickly remedied it with ‘Revolution’ for kitten’s. Besides Revolution for kitten’s being safe for bunnies (be careful, some brands aren’t, why I use Revolution – cause I know it is), it is so easy to apply and will get rid of fleas too. My Henry also had the odd flea from my dog’s. So now I treat them all with Revolution about twice a year, and I’ve never had the problem again. Try this, and if it clears up, that would have been the problem. If it doesn’t get better and heal I think a visit to the vet may be in order. Henry’s healed up within 2 weeks I think, and you’d never known he had a mite issue and a bald patch.
Hope this helps LBP’s! Cheer’s.
PS – To help with any discomfort from the scab after I applied the Revolution, I dabbed a bit of antiseptic cream on his head. I wonder if this helped the healing process???