Ferrets will occasionally nip when frightened or mishandled. Make sure your veterinarian is ferret friendly and your pet's life will not be in danger if it nips. If it's time for vaccinations, have this done. Have the ears checked for mites and if you live in an area where heartworms are a problem, start preventative. Females should be spayed when they come into season or they will die.
Prolonged estrus is deadly to ferrets.
They're not like dogs or cats and will continue to be in season until something is done. Hormone injections may not bring your pet out of season, spaying will. Descenting is an option but not necessary. Intact ferrets have a strong musk aroma. When they're altered much of the odor disappears.