Anyone have any experience using I-67? His neck looks a bit thick or short. How do his calves do with movement, structure, size, disposition, pretty much your overall opinion? I have a Man Among Boys heifer to breed this spring. Man Among Boys is out of a Who cow and this heifer's dam is sired by Who. I thought about Jessie James but he is a Solution that is sired by Who. Afraid that was too much of one sire. Or maybe that would be a good thing.