My expereince is that it is going to be impossible over a long term to drop the coyote numbers in your area by any sustantial number. These critters are territorial and will defend theri territory against intrudering packs. Trouble is that if an area is vacant of com[petition and holds a good food source, coyotes will move in to take the place of those that have left or been killed off. Be that as it may, shoot everyone that you see. Same goes for feral hogs.