Mich. Comp. Laws § 287.267

Sec. 7. The county treasurer shall then deliver to said owner a license and also 1 of the tags approved by the director of agriculture, before mentioned, such tag to be affixed to a substantial collar to be furnished by the owner, which with the tag attached, shall at all times be kept on the dog for which the license is issued, except when such dog is engaged in lawful hunting accompanied by its owner or custodian.