Michael, Mast cell tumours, a common skin tumour of ferrets, often look like scabs. A scab of unknown origin that refuses to heal, is getting bigger, and is losing hair sounds pretty suspicious -- I'd have your vet take a look. If it is a mast cell tumour, they are usually benign but should still be removed a.s.a.p. Laura Laura L'Heureux Kupkee U. of Illinois Vet Med Class of `96 [log in to unmask] [Posted in FML issue 1155]