The more it stinks the more possums and coons you'll attract. Baiting coyotes is best done with large piles of roadkill- but even then it's not an overly productive form of harvesting coyotes. The most effective way to kill coyotes off bait is to put it in a place visible from your home or at least along the road where you can catch a glimpse of coyotes feeding during random daytime times. When they are there, snipe one. In order to consistantly kill coyotes off bait you need to understand what makes coyotes move- and how they'll do it.... if you have this knowlege, just call them in and save yourself the humiliation of picking up 3 day old possums on the interstate.