Spring Brook Ranch is devoted to breeding the finest tibetan yak available, selectively breeding for specific traits. We prefer yak that are robust and stocky, never rangy or coarse. Since yak evolved in extreme climates characterized by long, cold winters, a quality yak should have thick wool and a full skirt. It should also have a pronounced forelock and well-developed chaps on the front quarters.

Yak cows should be robust but feminine in appearance, exhibiting good mothering ability, plenty of milk and ease of calving. We select bulls that are masculine but not coarse, that breed aggressively yet are gentle with their cows. Spring Brook Ranch performance tests all of our breeding class bulls.

Temperament is another important trait that we select for. We believe yak should be docile, and not aggressive toward humans. Our weanlings and yearlings spend time in proximity to people, where they become accustomed to human activity and learn respect without undue fear. We enjoy spending time with them and getting to know the unique character of each animal. Joy of ownership is very high with yak.

There are an estimated 4,000 to 5,000 tibetan yak in North America. Because of BSE (mad cow disease) we no longer have access to yak in Canada, further dividing the continental herd. Many of the yak in the US are what could be considered commercial grade, they are not show stock or exemplary examples of the breed. We concentrate on producing what are known as wooly or super-wooly yak. The success of Spring Brook Ranch's seedstock breeding program is reflected in the ribbons we win at the National Western Stock Show in Denver. For the past four years over half the ribbons won have gone to Spring Brook Ranch animals.