The Caucasian Ovtcharka is a breed not yet well known in the United States. Originally bred to protect livestock, this large dog needs a lot of space, activity, and a firm handler.
Heidi Schwartz is one of the few North Americans to recognize the potential of this breed, and to fall in love with one!
http://www.akc.org/breeds/caucasian_mountain_dog/index.cfm
http://www.dogbreedinfo.com/caucasianowtcharka.htm
http://www.dogbreedslist.info/all-dog-breeds/Caucasian-Ovtcharka.html#.VFPD36PD_cs