http://www.smartgroups.com/message/readmessage.cfm?gid=1423922&messageid=4454 Hi Sandy and Dr Karin, Rickets is not common with pet ferrets in the US if they are fed a ferret food or a kitten food. If they are fed an all meat diet only then there will not be enough calcium in the food. (We still see this with the big cats that are kept as pets. And in iguanas that are fed an all lettuce diet. Lettuce is low in calcium) Rickets is caused by an abnormal calcium to phosphorus ratio. Usually too low of a calcium level. Therefore rickets is not likely unless this kit was being fed an all meat diet. Juvenile lymphoma, distemper, AD, disk injury, anemia, cardiac disease, and severe metabolic disease would all be more likely differentials to rule out. Hope that helps, Jerry Murray, DVM [Posted in FML issue 4144]