Yeah i remember Wolf writing about "hot blooded" breeds as well. It would be cool he could elaborate on what hot blooded means and what it brings to the table. Those breeds he mentioned, as well as the greyhound I think were the bloodhound, bulldog, pointers, mastiff, wolfhound and maybe some others ie bull terrier and pitbull. I know these breeds were used in creating some of the best pig hunting dogs in Australia. There's some interesting reading in the dog profiles section about the Old Serbian Greyhound, which it seems is extinct now, unfortunately.