Don't know anything about Don's dogs these days. Looks like he's got some "pit" bulldog bred into them. As for his older blood, 25 years ago, my uncles got some of that. This is back when Don was in Fort Pierce, Fl. The male he got from him he used to work cattle. Dog would head and ring like a cur, and catch anything you told him too. Lost him to a gator, but not before he bred 'em into his curs. Still some of that old blood "workin" around Central/South Florida. The cowman that are using them don't post pictures