I no of someone who has a litter of american bulldogs cross grey, the sire is more racy than a lot of pitts, jumps 5 bar gates has cought the odd bunny on lamp obviously very few, but is quality on somethings, the pups should be more racy than first cross pitts. By the way this is not an advertisment as i dont no the full script with the litter, what i am saying is not every bulldog is to bulky to be of any use.