From the manufacturer:
Our Bison Strips are made of locally sourced human grade, bison round that we grind ourselves mixed with bison liver and kidney.
Bison has one of the highest protein contents of all meats. It is considered to be “lean” since it’s relatively low in saturated fat. It’s a good source of omega-3 fatty acids and conjugated linoleic acid — known as the “good fats". It is also great for pets that has beef, chicken or pork allergies.