My female crestie has an underbite! I got her when she was a couple months. I give her repashy cgd with calcium without d3 every 2 nights ( once in a while every 3 nights ) I am worried that she has mbd? She has no other signs of mbd, just an underbite. Yes, I know it could be genetic, but I was wondering if it wold hurt her if I bred her? I also know that no one wants a crestie with an underbite to breed. Please help, I am worried about her. She eats a lot. Thanks!