I had several Lightner dogs back in the day that were outstanding little small dogs and most of them were real game. I use to see a few tiny Colby dogs to. I'm not sure the reason why lots of them little dogs seem gamer than the big dogs but it seem to me like they were a little gamer and some had big dog mouths. I know one thing for sure they are easier to keep and handle. It stands to reason all the added larger American nonpitbull dog bloodlines that were bred to the small early imported dogs had to hinder the gameness a little. Randy