Ive had alot of diff. bloodlines over 30 plus yrs and dont consider myself a breeder but can say ive tried most lines out there and have fewer pulling up on me than rbj dogs.They may not be the best line because everyone has there own opinion on what a good dogs is,but can tell u I'll feed these fool dogs as long as I can walk,then maybe I'll crawl out to them.Just my 2cents.