These are Aussie/Heeler crosses or (more rarely) Aussie/BC crosses. Here are some websites or articles explaining them:**Links removed by Moderator**http://www.dogbreedinfo.com/texasheeler.htm
This is what Bogie is. Mom was a registered Blue Heeler; Dad was a registered red-tri Aussie. All 6 puppies were cute as buttons, but Bogie was the only one not already spoken for when I got there. He was born on a cattle ranch and both parents worked cattle. So far he is turning out to be a great dog -- we got him after we suddenly lost our other camping dog last December.
He is smart, spunky, mischevious, happy, and attached to his people. I'm sure he would make a great cattle dog -- he herds the cats all the time (much to their dismay!).