Just a suggestion since we had a male with the same symptoms. We found that he had a urinary tract infection which he was misinterpreting as a sexual urge. Of course, this could also be an incomplete neuter (one testicle not removed), but you might try your vet's choice of anitibiotics first, before thinking about surgery. I am not a vet. I am a vet tech, running a ferret shelter. Regards, Carolyn Kinsey Ferret Rescue of the Western States [Posted in FML issue 1419]