Experienced owners of rabbits, HELP?

Okay, here's what you're going to want to do. It sounds like he might be reacting to some sort of skin infection. Put an orange in the fridge for about 45 min. Take it out and cut it in half. With the skin of a half in your hand (put the other half back in the fridge), rub the open part on the bald spots. Just leave it there for about 5-10 min squeezing ever so slightly (all u need is a little juice). The citrus acid should neutralize the infection. If this doesn't work grab the other half and repeat. Good luck!