well dude you must not know too much about dogs than cuz pitbulls have so many genetic problems. i own 1 pitbull w multiple genetic problems and hes actually better off tthan some of my friends pits. they have serious serious serious skin issues especially on the spots that look pink like their belly, ears, and snout which is hell 4 the dogs, they have stomach problems, are super prone 2 infection and having stomach sickness and problems, and actually have low immune system compared 2 mutts. not 2 mention my pup was born w a crooked toe pointing sideways and a slightly lazy eye. all genetic problems.....Labs have their own set of genetic problems too. all breeds do, its just 2 what degree, alot of the lil tiny breeds that are USELESS might not have problems. but i would say that there isnt a breed of working dogs out there without genetic problems. people think pits were bred 2 fight, theyve been around 4 hundreds of years as Cattle dogs who were bred 2 be aggresive 2wards other animals but not people, that why they get used 2 fight, but its not what their for, their farmhand rancher dogs.