Mich. Comp. Laws § 317.61: Private breeding grounds of fur-bearing animals; approach or entry.

Sec. 1.

Any person or persons who, without the consent of the owner or caretaker of a ranch or enclosure where fur-bearing animals are kept in captivity for breeding purposes, shall approach or enter upon the private grounds of the owner or owners of the said animals within which the pens or dens of the said animals are located, and upon the fence or enclosure of which notices forbidding trespassing on the said premises are kept posted, so as to be plainly discernible at distance of not less than 25 yards, shall be guilty of an offense and liable to the penalty hereinafter provided.