From what I've read and seen it seems that breeders have been doing inbreeding or as it's called in the hobby line-breeding as an acceptable practice and it's been done for several years. I'm sure some people have a limit to the number of generations of offspring that they'll breed back their mothers in order to not risk any deformities. I'm planning to do it in the next couple years. If I get lucky and produce a male of the worlds first morph combo that I'm shooting for I will definitely be breeding it back to mom the following year for the chance at another worlds first.