Someone said that reptile genetics are different from mammalian genetics. I believe this is false. Genetic material is genetic material. It is all made of the same stuff and vulnerable to the same stuff that causes mutation. Mutations and genetic variety are how we got here from sponges and amoebas to ball pythons and humans, so even those creatures can suffer from such effects.

When line breeding anything, the chances of pairing two creatures who are het for anything increases. Even a very small gene pool can withstand inbreeding if the deformed beings can't breed. If every human who got cancer didn't live long enough to have children, cancer would not be nearly as big a concern as it is, considering it's heritability is a such a factor. I'm not saying the amount of wobble is, though, because it's apparent that it's not. I'm just pointing out how line breeding could be used for good.

tl;dr Mammal and reptile genes work the same. Line breeding is not always a bad thing if you cull (or just don't breed) the deformed offspring.