QUESTION:
My ferret is neutered but he's behaving sexually with my other ferrets. Is this normal?

ANSWER:
It is not normal for a neutered ferret to act that way. First I would consider taking him to the vet for a check up to make sure he does not have a urinary tract infection, or possibly an infection in the sheath surrounding the penis.

The other problem that is shown by his behavior is the early signs of ADRENAL DISEASE (he is not too young for this). THE SEX HORMONES ARE AFFECTED AND THE FERRET EXHIBITS SEXUAL BEHAVIOR. Once again your vet will be able to advise you if this may be the onset of this disease.

Until then you may want to keep your ferret in darkness once the sun goes down, by covering the area of his cage that receives light or keep him in a darkened room at night, this prevents more stress to the adrenal glands. Ferrets are governed by photosynthesis (amount of natural light/seasons) and therefore additional light only causes stress to the adrenal glands.