patchy and thinning fur

Question
i have a male rabbit that is about 2-3 years old.  he is a black and white lop.  i first noticed a small scab on his back and then fur started to grow back, but now his whole back is thinning so he appears to be gray rather than black because he has lost the top hairs, they are coarse, sort of lik ethey have been chewed.  he also has a very defined bald spot on his back acouple inches from the tail about the size and shape of half a lemon.  his stomach is losing hair also an dthe insides of his back legs...his genital area is clear, as well as his eyes and his nose...the fur on his head and front legs is fine and he acts normal.  the bald spots are not really scaly...is it posibble that he pulls and chews his hair or is it some medical problem like ring worm or mites?

Answer
Hi Martha,

I am guessing that your thinking is right but I am leaning more towards mites. If it was ring worm its usually scaly circular lesion. The only sure way to find out we be to take your bun to the vet. They can have many different mites for many different reasons.