Reference Sire ONLY. KT Winston Von Bubba is an AKC Registered Mastiff male that we purchased in 2004. Winston is a very affectionate dog that loves people; he has never met anyone that he was not his friend. However, if the need arose I think that he would protective. He loves the kids and he loves to play with the kids around the yard, he loves to play fetch. Winston is very structurally correct.