ValueBull USA Collagen Twists Dog Chews, 5 Inch, Natural Long-Lasting Dog Treats, 100 Count Bulk PackValueBull USA 5 Inch Beef Collagen Twists for Small Dogs are the real deal. Crafted from a single sheet of the inner, collagen rich layer of beef skin known as corium, Collagen brings benefits to nearly every part of your beloved pup. It starts with the gentle and natural dental and jaw muscle benefits of chewing a durable treat. From there, the highly digestible collagen is quickly converted into essential amino acids that help rebuild and repair