Did you read the story about the 15-pound dachshund who saved his human mother and brother from a 200-pound bear? It took $4000 to stitch the brave little dog back together, but he drove the bear off. We have a dachshund mix and, let me tell you, he's only little on the outside. On the inside he has the heart of a dire wolf. I firmly believe would take on a pack of grizzlies to save his family.
Our pug mix would totally back him up--from about thirty feet--by barking like crazy. But she wouldn't need stitches after.