Fester, the vast majority of the 153 mentioned above were working dogs - herd dogs on sheep and hounds that ran lions and maybe bears.
Not a one was a fight specialist. I don't consider dogs that tree mountain lions and bears fight specialists. And then there's still the issue of wolves operating as packs. Just like a team of catch dogs would make short work of a lone wolf, a pack (or even a pair) of wolves would make short work of any lone dog.
