His name is Hulk . Well , look at him - what else would you call him ? Weighing twelve and a half stone ( 175 lbs ) , he is believed to be the world 's largest pit bull . And because he is only 17-months-old , he has n't stopped growing yet . Proud owners Marlon and Lisa Grennan , from New Hampshire , say their monster pet is 100 per cent trusted with their three-year-old son , Jordan , despite the breed 's fierce reputation and even let him ride the animal like a horse . Indeed , photographs show the toddler happily riding on the canine 's back , grabbing the collar just behind its 28-inch wide head . While pit bulls are branded 'dangerous ' with breeding bans enforced in the UK , Mr Grennan claims they are actually very caring and fit for the family . Scroll down for video . Impossible to miss : The Grennan 's dog is almost three-times bigger than a normal American pit bull terrier . Give us a hug : Hulk is just as tall as his handler Frances Cummings . All aboard ! Proud owners of the world 's biggest pit bull dog have told how their three-year-old child rides the 175lb pooch like a horse . 'These dogs are very balanced and gentle - they are nanny dogs , ' he said . ' I don ’ t think it ’ s irresponsible for people to have pit bulls and children . They ’ re dogs just like any other dog . 'No matter what the breed it is , it is hundred per cent how you raise them . ' However , Mr Grennan acknowledges that a dog the size of the Hulk 'could kill someone if it was in the wrong situation at the wrong time ' and 'snap an arm like a toothpick . ' The Grennan 's dog is almost three-times bigger than a normal American pit bull terrier . He is also still a puppy meaning he could grow even bigger . Each day he is fed a protein-rich diet consisting of supplements and 4lbs of ground beef . The Grennans believe the bigger the dog , the better . Giddy up : Marlon and Lisa Grennan , from New Hampshire , say their monster pet 'the Hulk ’ is 100 per cent trusted with their son , Jordan , despite the breed 's fierce reputation . Open wide : Hulk showcases his big teeth as he 's taken for a walk . Dinner is served : Each day he is fed a protein-rich diet consisting of supplements and 4lbs of ground beef . Shall we dance ? Hulk with Mrs Grennan at home on February 22 , 2015 in New Hampshire . Together they run Dark Dynasty K9s , which specialists in breeding some of the world 's most fearsome guard dogs . Marlon , a former boxer , formed the company ten years ago with just two dogs , after suffering a hand injury which ended his career . They now own more scores of dogs , many who live in the house with the family on a sprawling 150-acre ranch . These include more than more than a dozen highly trained pit bulls - and a single chihuahua . And while he admits his dogs are trained for aggression and power , he says the criticism is usually from people who lives in safer environments with no need for protection . He added : 'It ’ s very , very , important what I ’ m doing . ' I live in New Hampshire where there ’ s no crime and I don ’ t have to worry about that kind of stuff . 'But I ’ ve got clients in Grenada and parts of Africa where there is . I ’ ve got clients in terrible , terrible places . They don ’ t live in Candyland , they live in fear . 'And why should somebody else live in fear if they don ’ t have to . So that ’ s my job , to try to alleviate somebody else ’ s fear by giving them a family dog too . ' Speaking out : While pit bulls are branded 'dangerous ' with breeding bans enforced in the UK , Mr Grennan claims they are actually very caring and fit for the family . Ultimate protection : The Grennans believe the bigger the dog , the better . Going for walkies : Together they run Dark Dynasty K9s , which specialists in breeding some of the world 's most fearsome guard dogs . Animal magic : Marlon , a former boxer , formed the company ten years ago with just two dogs , after suffering a hand injury which ended his career - his son ( pictured above ) has grown up with the pets .
Fearsome dog is bred by dog farms specializing in barking dogs . He towers above his head when standing on his hind legs . The pooch eats four pounds of raw beef every day and will only get bigger as he is only around 17-months - old .