Couple of my 100% American Bulldog, Bo Diddly now aged 7...95lb and 23" TTS.......prey drive is very high but not built to run big distances! Has caught and dispatched fox, squirrel and rats although not stock broken and cost me for a ewe when he was 9 months old?? hip and elbow scored under ofa and came back good (BVA 5-10, elbow 1,0), has championed out in the show circuit and even jointy won an ed reid stafford show a few years back. Pain in the ar*e around male dogs although great family guard and brilliant with the kids.