I have a silver blaze who is 1 1/2 years old. He is smaller than most male ferrets, but otherwise healthy. He does have allergies which gives him difficulty swallowing larger food (ie: larger than normal kibbles), when congested, and he did have a serious reaction to Fervac this year. It would appear to me that many ferrets have similar characteristics, so I would be hesitant to catagorize "blazes" as high risk for health problems at this point, but I would certainly be interested in what others have experienced. Similiarly, I would not change my ferret or even choice of future ferrets because of a potential increased health risk...I really like the look and temperment of my little guy..in sickness and in health. Jennifer & SHERLOCK [Posted in FML issue 2845]