I,ve been trapping coyotes for a couple of yrs. now. They are truly an amazing animal, I read somewhere that the more you perscute( trap, shoot, poison.) the bigger litters they have, also a bioligst said that you would have to kill 70 percent every yr for 5 yrs to control them If you don,t get 70 percent for just 1 yr. then your losing ground. They are surviors for sure. If we ever have a nuclear holocaust the only survior would be the cockroach, coyote, rat, whitetail deer. Good Luck with your coyote problems. Later gotta go skin one I caught today.