I experimented with this idea last year. Peeing in scrapes only made bucks mad. One scrape was doubled in size the next day. Urine is urine for the most part. If you don't think so, pee in the yard and turn a dog loose. He will pee in the same spot to mark turf ,he can't distinguish the difference. Human scent on trees & ground from boots make him more skittish than pee. I am going to keep experinmenting this year.