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Big Rock Bison – Shallow Lake, Ontario

Big Rock Bison – Shallow Lake, Ontario

Mark Shouldice and his family manage a herd of Certified Animal Welfare Approved by A Greener World (AGW) and Certified Grassfed by AGW bison at Big Rock Bison in Shallow Lake, Ontario.

The bison are managed outdoors, grazing the pastures where they are able to demonstrate their natural behaviors. In addition to being Certified Animal Welfare Approved by AGW, the bison herd at Big Rock Bison is Certified Grassfed by AGW, the first—and only—food label in the U.S. and Canada that guarantees food products come from animals fed a 100% grass and forage diet and raised entirely outdoors on pasture or range. “We consider ourselves land stewards,” says Mark. “Grassland restoration is a major component of our farm operation. We work with nature to promote the growth of native grasses that our bison thrive on. By diversifying our eating habits, we can help restore the natural growth process for animals. If we all diversify our food selection, we will be able to return to a more natural and sustainable growth for our animals.”

Big Rock Bison’s herd grazes the native grasses spring through fall, with supplemental hay in the winter months grown and harvested on the ranch. Raising grassfed bison on pasture takes advantage of their evolutionary development: “We feel it is our duty to keep our bison naturally raised in a low stress environment and feel that we have set up Big Rock Bison to be exactly that. Our priority is to continue to do what is best for our animals, our lands and our customers.”

Certified Animal Welfare Approved by AGW, Certified Grassfed by AGW bison from Big Rock Bison is available directly from the farm and through their website. For  more information about Big Rock Bison, visit along with the farm’s Instagram and Facebook page. Contact Mark Shouldice of Big Rock Bison at

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