I am a firm believer in the cow poop! I know that they can still smell more than one scent but I think it does alot better than fox pee or raccoon pee or anyother pee. That much pee is unnatural. I don't hunt in the middle of the pasture but only about 100 yards from it. I still circle around and come into the wind and not across any trails to get to my stands. I have had deer with thier nose to the ground trail me to the tree I was in and not be the least bit concerned with it. Maybe they smelled my scent and didn't care. Maybe they only smelled cow crap. WHO KNOWS!?!?! All I know is they didn't bolt, or freeze, or snort, or stomp, they just kept on walking. And even if stepping in crap doesn't work at least it is free!!!! hahaha