Well when it first happened I read on the Peter Gurney site that it could be a lack of calcium so I started giving him Osteocare liquid like he recommended and within a week or so he started getting his legs back again but the Osteocare doesn't seem to work anymore and it just seems to be a matter of time. He has to have frequent baths though which he doesn't seem to mind as he's very tame. I've had him since he was born.