had a merle 3 quarter bred dog early ninetys he was an absolute workaholic good ferreting dog good on teeth and bambi good lamp dog too hancock told me when he started breeding collie xs he used to pay top dollar for retired coursing greys and then he stopped and used any old greyhound he could get as the greyhound blood was only needed to add speed and shape to the pups his words not mine think when he started to go wrong was when he tried the same principal with the collie blood using scatty nervous type collies instead of proper working sheep herding blood jmo