so you don't have any preference at all in terms of type of mix? there will be deer x grey, bull x grey, beddy x whip, collie x grey, saluki x grey etc. etc. all doing what you say, and all very different dogs, but you don't think it matters about the breeding? If I was after what the OP is asking I could rule out at least three of the mixes I've mentioned and I don't care what they currently do or how well they do it......not being argumentative, just making a point