Answer:
Ermine are wild animals, and as such they are classified as exotic pets. Some state and local governments prohibit people from keeping exotic pets; others require special licenses, and sometimes a liability insurance policy in case the animal attacks another person. To learn whether ermine are allowed in your area, contact your state wildlife department or the department of fish and game for more information.
The ermine, a type of non-domesticated weasel, is a vicious carnivore, and does not make a safe pet.
If you find ermine appealing, you may enjoy owning a ferret, a cousin of the ermine that is smaller, but similar in appearance. Ferrets come in many different colors, so it is possible to find one that's white or nearly white.
Ferrets have distinct personalities and make playful, fun and loving pets, particularly if spayed or neutered.