We had someone on here recently that had a little crestie with a bent tail, one of the beginning symptoms of MBD. The current owner was feeding repashy CGD which led us to believe that the previous owner (pet shop) didn't feed them the right diet.

If its just a slight underbite, it is probably a small case of MBD. To my knowledge, there is no cure but if you feed a proper diet you can slow it down almost completely.

Would I ever breed a gecko that had MBD symptoms? Absolutely not. I would only breed animals with traits that I wish to pass down to its offspring. Big crests, colorful, no underbite.

I have a rescue gecko that was mistreated most of her life. She has a bald spot, missing most of her crest scales, dropped tail, and is just a sad looking grandma gecko. She was marked as "retired breeder". When I got her she had parasites and wouldn't eat. She also has a strange bite which leads me to believe she might have developed MBD with her previous owner. She actually laid a few eggs for me the first few months I had her, but they were under calcified and didn't make it. She is doing just fine now, but I would never breed her.