Have had problem with them for past few years ever since a fox/yote pen for people to run them with hounds went out of buisness. They just opened the gates and let them loose.I have shot a dozen the past year and lost a dozen or so cows/calves too. I let a man run them with hounds at night and that helped some. One person told me to take hamburger and put rat poison in it and leave it out.Said he had luck with that I never tried it though.My best luck was with a 30-30 sat out in the pastures in the evening and went hunting.Good luck