Oso

This is Oso (or Osito).  He is pretty much the best dog in the world.  He is so sweet and playful and smart.  He lives about 5 minutes up the road from us but he comes down to our house every day because he likes us.  I know that he comes because he likes us because for a long time we didn't feed him.  He is one of the few dogs in our community who is actually well-fed.  He sleeps outside of our door every night and helps take care of the house.  He also goes with us on short and long journeys.  He went with us on a 5 hour hike one time.  While we were in the states for 3 weeks we found out that he still came to our house every night and slept outside our door to take care of the house.  Now I give him a little food whenever I give the cats their food even though I know they feed him well at his other house.  Anybody know what kind of dog he is?