Mich. Comp. Laws § 287.115: Records of horses or ponies.

Sec. 5.

A licensee shall maintain current records of each horse or pony owned or kept by him, including the name and address of the supplier or seller, the date the horse or pony was acquired, the age, sex, breed, and color with markings, and a description of any physical defects. The records shall be kept for a period of 2 years after the horse is no longer owned or kept by the licensee. The records shall be made available to the department, or its authorized representative, at all reasonable hours.