My expierience the wiley dog, is during matting season, a real good howler works best for me. The female in heat call and urine scent hasn't worked as well for me as the howler. It MUST be a challenge call, and "HE WILL COME"
The urine scents that can be purchased are OK, but, sometimes it just seems that the males know its not what they want. They shy away the moment they detect the scent. So I no longer use them.
Hope this tid bit helps you in your quest.