these dogs, these terrifying, massive dogs that have emerged recently, i am a dog lover, but. xl bully: dangerous dogs? pet or problem? an xl bully a crossbreed between the american pit bull terrier and a type of bulldog, xl referring to the dog s size. some weigh as much as 150le and stand up to 23 inches tall. today, the mum of a ten year old boy who died after being attacked by an xl bully has said we need a proper rethink of how we licence breeders and dog owners. i encountered on the other day when i encountered on the other day when i was walking my beloved labrador and west highland terrier on clapham common, and it was a classic case of, you know, based on the end of a chain, and then there was the dog, too. or is thatjust snobbery? i don t know. my little westie were