"The presents of neurological disorders in snakes bred from small or narrowing gene pools, is not conclusive evidence of deleterious effects from morph breeding, but it certainly is cause for concern.

Many disagree, stating that as these neurologically impaired animals still breed, feed and crap and so there is no reason to worry."
http://www.reptileforums.co.uk/forum...nbreeding.html

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Inbreeding snakes, breeding closely-related snakes together, increases the probability that any recessive traits hidden in the genome will be expressed. Some recessive traits are desirable, such as albinism, and some may be deleterious.
In general, snakes appear to be highly tolerant of inbreeding. There are a few examples where inbreeding has produced snakes with problems, but considering how much inbreeding has been done in the projects to propagate morphs, inbreeding appears to only rarely have any negative consequences.

http://www.vpi.com/mailbag/2006/11/i...em_to_consider