Dennis McDonald has been breeding performance horses and legendary angus for over 40 years. Dennis is the hands-on owner of the Open Spear Ranch. Dennis prides himself in the raising his animals both in natural surroundings but with the best of professional care. The OSR comprises approximately 32,000 acres and is one of Montana's premier ranches. This ranch is historically the base for Sweet Grass Land and Cattle Company, one of the West's great pioneer cattle outfits.