Bald spot?

[InternationalBunnies]

I'm not sure if this is a problem or health concern but I just wanted to make sure.. My little guy has had this bald spot behind his head between his neck and back for a while, is this abnormal?

 

[Azerane]

It could be from patchy heavy shedding, but it also might not. It's possible it could be mites, is there flaky white dandruff as well? Or just the bald spots. Is he bonded with another rabbit that could be over grooming him in those areas?