Deafness can be a difficult thing to prove in ferrets - you don't mention what color Feisty is - deafness is most commonly seen in albino or color diluted varieties. Now the blindness is something different entirely. Cataracts present as a white opacity within the pupil, not a milky film over the eye. A milky film over the eye is more suggestive of either a corneal problem, inflammation within the eyeball, or perhaps glaucoma. Unfortunately, without more information in the form of a more complete description of what you are seeing, or better yet, a photograph showing the eye's close up, I may not be able to shed a lot more light on this problem. However, another possibility is that the milky film is not the problem, but that there may be retinal degeneration, a fairly common finding in older ferrets. With kindest regards, Bruce H. Williams, DVM, DACVP Join the Ferret Health List at http://groups.yahoo.com/group/Ferret-Health-list [Posted in FML issue 3396]