Hi, I am new to Binky Bunny and I apologise if I have put this in the wrong area of the forum.

My bun, Buster is missing a lot of hair on his neck/ dewlap area. I noticed it last week when he was stretching his neck to reach for some kale. He was also shedding quite a lot last week; thought that might be what it was and it will grow back.
After checking his neck/dewlap again yesterday, the condition has not improved and I am worried it may be something else. The skin exposed is also dry, unsure if flaky. I have given him a second dose of Revolution (for puppies and kitten) yesterday to see if it would help.

He is still eating and playing as usual, but he is not liking me as much he used to it seems. No more morning bunny licks and does not like petting/ head rubs as much

Has anyone experienced this before? Is it a vet ‘must-see’ or is there a home remedy I could try to keep the cost down? Mites or something else?

Thank you in advance for advice given.