Mich. Comp. Laws § 287.389: Sales by public auction or by weight; disposal of unclaimed dogs and cats, maximum price.

Sec. 9.

Dogs and cats shall not be offered for sale or sold to a research facility at public auction or by weight; or purchased by a research facility at public auction or by weight. A research facility shall not purchase any dogs or cats except from a licensed dealer, public dog pound, humane society, or from a person who breeds or raises dogs or cats for sale. Any county, city, village or township operating a dog pound or animal shelter may sell for an amount not to exceed $10.00 per animal or otherwise dispose of unclaimed or unwanted dogs and cats to a Michigan research facility.