I am definitely no vet, but It sounds like your ferret has an infection that at least partially fungal. My dad, after serving in Guam in WWII, came home with 'Jungle Rot' on his feet, ad faced amputation. The description of his syptoms sounds identical you your fert. Qhile he was wating for a bed at the vetrans hospital, we had run out of the meds his doc had given. We had some medication for our dog for a skin infection, and out of desperation tried some on a small patch of his skin. By that night that patch of skin looked heather. He treated both his feet and was walking a week later. He had to use it on and off for years, but he was eventually completely healed by it. This is the stuff that worked on him. It is both an antibiotic and antifungal. (the description was lifted from a pharamacy site off the internet... PanalogT: A topical ointment with antifungal, antibacterial, antipruritic (anti-itch), and anti-inflammatory properties used for a variety of skin conditions. It is not recommended for deep wounds or if pus is present. Rare superficial reactions have occurred causing redness and swelling. Oral ingestion can cause increased thirst, urination, and hunger. Also found under a variety of other trade names. Good luck Joe Bandit (dalmation), tubby(cinnimon fert) and boots(the cat) the ancient one aka - 'Yoda' [Posted in FML issue 3820]