The Caucasian Ovtcharka (sheepdog) would most likely win in a fight between these two breeds. The sheepdog stands between 25 and 28 inches at the shoulder and weighs between 99 and 154 pounds. The pit bull stands at 18 to 21 inches and weighs 30 to 50 pounds.
The Caucasian Ovtcharka comes from Russia and is a strong-willed and assertive dog that can easily become ferocious and unmanageable if not trained properly. Even with proper training it protects everything in a household it considers part of its family and may injure anyone it considers a threat. The American Pit Bull Terrier, however, has consistently scored high on temperament tests as a very friendly dog and a good family pet. Aggressive tendencies are usually only seen in dogs trained for fighting.