12" Braided Collagen Sticks Tuesday's Braided Collagen Sticks 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. Collagen is a naturally occurring protein found in the skins, bones, and cartilage of cows. Bovine collagen may have numerous benefits, such as helping alleviate osteoarthritis symptoms, preventing bone loss, and improving skin and coat health. These Collagen Sticks are an abundant source of natural collagen. Ingredients. Collagen, Natural Beef Flavor. Chew Meter. Tough. This firm, durable chew will slowly soften as a dog continues to chew.