The big guy is a Caucasian Shepherd (or Sheepdog, Ovcharka, Otvcharka, or Owcharka) Or Caucasian mountain dog, Sage Ghafghazi, or Kavakzskaia Ovtcharka. Big dog, lots of names. To get an idea of his size, the little guy is a full-grown pibble. I believe they are Ponch the pibble and Goofball. Thanks aramm for sharing them!