We have always infested in reg low EPD angus bull......but dang, it hurts when you pay out a ton of money and the dang thing breaks his unit after a couple weeks.. happens more than i can recall. This year, we found some wagyu bulls. They need some growing, but both were fertile so we put them on the heifers. Only time will tell. A neighbor bought some heifers from us and i just passed his pasture and saw some longhorn bulls in there. I also saw a calf.. need to get with him and see if that came from one of our heifers, he's added a few of his to the bunch. We luted all our heifers last year, so it would be nice to know if it failed or not..