At the farm where I keep my heifer, her sire , the herd bull, he is a 4-year old Black Angus, he is a smaller stature bull . I am about 5'11 and the top of his back comes to right around the naval area on me. My main concern is, could he possibly be a Lowline, or are Lowlines smaller than that, or are there just some smaller statured purebred angus bulls like him?