Michigan Compiled Laws, Chapter 287. Animal Industry § 287.895

Sec. 5. (1) A person shall not import a ferret into this state unless the person has an official interstate health certificate or official certificate of veterinary inspection signed by an accredited veterinarian and a current rabies vaccination if the ferret is over 12 weeks of age, and a current distemper vaccination if the ferret is over 6 weeks of age. A record of the vaccinations including date and type administered shall be on the official interstate health certificate or official certificate of veterinary inspection. A copy of the official interstate health certificate or official certificate of veterinary inspection approved by the state veterinarian in the state of origin shall be forwarded to the state veterinarian within 10 days after the date of issuance. An official interstate health certificate may be obtained from a veterinarian or the department.

(2) A ferret under 6 weeks of age shall not be imported into this state unless it is accompanied by its natural mother.