Had 2, 1 was quick enough in a straight line and couldn't think for its self. Num as a post. But would kill as many foxes as you could throw at it. Other was a bitch 24 inches, would wrestle a crocodile, but couldn't catch a fox in a phone box. I've always rated bull x lurchers for an all round dog. Plenty of different blood in the mix. And no less than quarter bull.But I have seen some classy 3/8 5/8 bull greyhounds.