Max if you breed two greyhounds together you get greyhounds but if you breed a greyhound to a collie you get half greyhound half collie that's as I see it a 50/50 split, the greyhound man said if you put two greyhounds together the dam gives you a higher % in the makeup of the pups. I am not a generic expert I just going of what a breeder of racing greyhounds said to me, is it not also true that in the greyhound game good racing britches that have pups a high % of the bitch pups do not race but go on to be just brood britches only...atb