Thanks starleomach. It does wax and wane. She started munching on herself after the breeder tried to breed her and the male beat her up pretty good. Thats the reason I have both my girls, their last (or first and last) breeding sessions went very badly and she pulled them out of breeding. Since neither Mark (my boyfriend) nor I ever plan on breeding, it's just fine with us that they live a calm and male chin free life full of play, snuggles, and treats. We try to keep her entertained and they are in a quiet room in our apartment. I'm hoping one day she just stops, but I'm betting she's going to munch away for the rest of her life. As long as she doesn't end up with bald spots again (which was an immediate vet visit resulting in ear drops, arthitis meds, and ointment), we will just chalk it up to Dharma being Dharma. I'm going to expand their cage in the spring and add 2 feet of open mesh levels (their cage is custom, and only the front is meshed, the rest is solid), with more enrichment items for them. I'm hoping this will help and not cause her to chew worse due to the change.
If anyone has any other ideas that they have been successful with to minimalize fur biting, I'm willing to give it a shot!