Collagen Slices® pack delicious flavor into a thick, natural Collagen (from Beef Hide), starting off as a harder chew and softening as your dog continues to chomp down. And we’re confident they will continue to chomp down! Our Collagen Slices are hand-tossed in Redbarn’s secret bully gravy made with melted Redbarn Bully Sticks and functional ingredients like chicken cartilage, blueberries, and Vitamin E to help support your dog’s overall health, even during snack time.