Mosinee, WI Animal Ordinances: Dog Leash Laws (2026)

Section 10-3(c) of the Mosinee Code of Ordinances makes it unlawful for anyone who owns or possesses an animal or fowl to let it run at large anywhere in the city, expressly naming city parks, boat landings, and softball, baseball, and soccer ballfields alongside every other public place. The owner, whether the animal is licensed or not, must keep it tied up or inside a proper enclosure so it cannot bother neighbors or people walking by. Section 10-2 defines "at large" as being off the owner's premises and not under a person's control by leash or otherwise, though a dog or cat riding inside its owner's car, or another person's car with the owner's consent, still counts as being on the owner's premises.

Section 10-3(c)(2) then carves out the exception that matters for most dog walkers: a dog or cat is not running at large if it is on a leash and under the control of someone physically able to control it. Any animal that is running loose, is unlicensed, and is required by state law or city ordinance to carry a license gets seized and impounded by a humane officer or law enforcement officer. Related restrictions in section 10-3(a) separately bar a dog or cat from habitually chasing vehicles, attacking people, destroying property, habitually barking or howling, or going unlicensed, so a leashed, well-behaved animal is the surest way to stay clear of the whole subsection.