I have only used him on a couple Angus cows, but I kept a son and used him as a yearling on some crossbreds and they are yearlings now and look to be decent cows. The other bull tended to turn out on his front toes a little more than I liked. The bull that I used as a yearling's full sister had her calf this spring and is doing pretty much the same good job that her dam did. He certainly did not take anything away. I wouldn't hesitate to use him on crossbred first and second calvers. They seem to grow well.