A badger is a bad animal, but they still get eaten by bears, mountain lions and other big predators.
A badger won't kill any dog. A good catchweight pit bull will take it out. Now I am not talking about some PETbull that does tricks for scooby snacks, but a working pit bull will kill a fucking badger most of the time. Not sayin it won't get fucked up, and not saying a badger won't kill one, but i'd put my money on the dog, if he's a good one. My understand is that the best ones will pick the badger up and shake the fuck out it because if they flip the badger in his back and work him on the ground they have a good chance of getting sliced up by the claws.
A game pit bull is solid as a rock and nothing on earth is tougher. Not even a badger or a wolverine.