true  ,  but  even the most game of any line bull terrier, once x back to greyhound   you lost some of that trait, your watering down the genes of the bull  right way.    . Not saying use (any) bull terrier,  but  people forget  somtimes what a bullx is,? even in litters  of pure bulls you get  lot of crap, so you going to get alot more  more in bullxs .!! 
 
  
simply put and true