ladyluck_t
Boxer Insane
From what I understand all "bully" breeds were bred to have an undershot bite, this was for a specific purpose (i.e. the reason the bull breeds were invented! ) it was so that the dog would bite, hold on, and still be able to breathe
kinda important if you want the dog to do it more than once 
kinda important if you want the dog to do it more than once 