has anyone heard of or seen a hunterway x bullxgrey, I have the chance to x these dogs and was thinking it might make for a good mix, sire a very intelligent working sheepdog with loads of stamina and the dam a very good working 1/4bullx3/4grey. I want something for foxing on the open mountains, and these dogs are available to me. Please be kind, I'm asking the question so constructive critisism or advice please.