Stephanie, Please, ask for the exact NAMES of the conditions! PLEASE! Without those nothing is known and the info is virtually useless. But once you send along those exact terms from the vets you will help many ferret people know a great deal more, and when there is more data from the x-rays and such that will help even further. These look like polydactyly and syndactyly combined. Actual complete feet BILATERALLY makes no sense to me for several very reasonable reasons rooted in developmental biology, genetics, and foot structure. (Besides, they are far enough down in the photos that they are BELOW the metatarsals for the most part so more likely polydactyly (extra toes -- and these can be in quite a large number) with partial tissue sheaths from syndactyly). (Like with the way that similar one with two bilateral human feet was in photos compared to the photos of this ferret.) Ferrets for their rear feet largely walk on the toes rather than also on more proximal part of the foot (in comparison to humans) and the ankle forms that extra joint which looks like a backward pointing knee. Toe walking and the use of the backward facing joint from the ankle is taken to an extreme in some other animals like ungulates (cows, deer, etc) and perrisodactyls (Like horses) which walk on the tip of some toes and the toes and nail/claw have specialized into bones like the canon bone and into hooves. Thanks for letting us all know that it is not a terrible case of keratosis (which when horribly bad HAS actually confused people into thinking that there were extra toes or extra partial feet). Keratoses can have a genetic vulnerability aspect, a sun exposure aspect, nutritional inputs, and other unknown causes. [Posted in FML issue 4622]