Caucasian Ovcharkas are an ancient molosser breed indigenous to Eastern Europe and Russia. They are primarily used as livestock guardians, but recently have been used as security dogs, personal protection k9s, and in Russian prisons. They are instinctual guard dogs and can be aggressive. Lone Star Mastiffs has picked CO's from bloodlines that retain their working abilities but can still be socialized. This breed requires a high degree of attention and training. Our Caucasian Ovcharkas are registered through ARBA (The American Rare Breed Association). Aurora and Renegade are both Master Champions of show and Beauty.