hi, been looking through this site, reading topics about people breeding dogs for what reason i can't understand ie,border terrier/whippet jack russell/greyhound, both crosses that detracts from the original speed that catches the prey.so why ,i ask myself, would you breed any terrier with a greyhound whither it be border,jack russell,staffordshire bull,wheaten,kerry blue, pit bull ,english bull,bedlington,as none of thesecan run and niether terrier nor greyhound are designed to turn. can anyone tell me why.