My rule has always been to breed my heifers to low birthweight Angus bulls, but I fell into the hype about I-80. I bred a who made who heifer to I-80 looking forward to that 70 # calf and today I learned my lesson. After the cow tried for two hours I penned her up and started the pulling. Once I seen the head I know it wouldn't be any fun. After an hour of pulling and rotating the calf because of hip lock we finally got the monster 130# calf on the ground. Now he still has not got up or nursed, but still hoping for the best. I learned my lesson to always breed my heifers to those low birthweight Angus bulls.