Merrick Naturally Stuffed Twin Hoofers Dog Chew. Natural, Non-artificial , Canine Pet Supplies / Shops It's like getting three treats in one - beef tendons, beef bone, and hooves It's like getting three treats in one - beef tendons, beef bone, and hooves No artificial colors, flavors or preservatives Made in the US with ingredients sourced in the US All the flavor of our single hoofer but twice the durability.