Our herd presently consists of  3,000 bison of which 1,300 are breeding age females (cows).

Cows average 1,050 pounds and have an annual calf crop of over 90 percent. A male bison (bull) weighs in at around 1,800 to more than 2,000 pounds between ages 5 and 6. Cows are checked for pregnancy in November. Their calves are born in April and May, weighing about sixty 
pounds and normally weaned in November.

The excess animals not needed to maintain the breeding herd are used for meat or to grow other herds. Durham Ranch bison are very selectively sold to restaurants and supermarkets all over the world.

As a member of the National Bison Association, our herd is raised in accordance with the NBA’s Code of Ethics, which was established to ensure the humane and sustainable raising of the American bison, as well as specifically prohibiting crossbreeding bison with any other species of animal. To view our Code of Ethics, please click here.