The 9" Curly Collagen Stuffed with Chicken are made with a thick strip of collagen chicken wrapped around a chicken sausage, making two treats in one. The beef collagen are less processed and more easily digestible when compared to traditional dog rawhide chews. These Collagen Sticks are made from a layer of tissue called the dermis, which is nutritious (made of about 70% collagen) and has a firm and elastic texture. | Tuesday's Natural Dog Company 9" Curly Collagen Stuffed with Chicken Dog Treat | Size 9"