i hate to be the one to tell you , but whatever running dog you have will have a trace of bull in it. whether it a greyhound or whippet . both have at one time no matter how long ago have bull blood in its genes. not every bull cross owner is the same either nor are bull crosses. im sure every family has the occasional physco in it. does that mean every member of that family is physco? youve obviously never owned a bull cross. theyre level headed, keen to please,faithfull dogs.rember tonight to thank lord orford and the whippet racers for making your lurchers that bit better