hi all: my brother has four ferrets, one of which has lost, within the past three weeks, most of all of his fur from his stomach. his skin is not red where there is no fur. He is active/eating/pooping, and the rest of his sable coat is summer fur, but not thin. I think he's about four years old. He has also lost the fur on about the last 1/2 inch of his tail but the rest of the fur on the tail is as think as his coat. any ideas? thanks beckers [Posted in FML issue 2435]