I do believe it is legal to track a downed deer with the use of dogs in WI. I taked to a gentalman this past summer at a sports show the Greenbay that has dogs trained for this. I did get a brochure from him as well as his cell number. I believe his business is Blood hound trackers out of Tigerton area. It is for sure illagke to use dogs for hunting purposes in WI though.