Thank you for all that responded about the so called "blood blister" on Hobbes. As it turns out, according to my vet, what he has is a cyst. We have drained the cyst and it comes back in the exact same spot. She recommends surgery to remove the cyst. I did mention the notion of it being a mast cell tumor and she said it didn't look or feel like a mass cell tumor. I do trust this vet as she has 3 fuzzies of her own and has been owned by ferrets for many years. Thanks again to all the wonderful fuzz-butt lovers out there! :) Brad, Kelly and the Idaho three (Hobbes, Susies and Elmo) [Posted in FML issue 3062]