The Icelandic+ Beef Collagen Dental Chew Stick Wrapped with Fish Dog Treat is made of USA beef collagen and Atlantic cod fish skin. The dog treat has ridges that are for good dental health. The long-lasting dog chews are rich in Omega-3 essential fatty acids and have multiple layers. They reduce tartar and plaque build-up for healthier gums and teeth and are a safe alternative to rawhide. They are 100% edible, so they are easy to digest and are 100% natural with no additives, no preservatives, and no supplements. These two-ingredient dog treats feature wild caught Atlantic cod skins that are sustainably sourced and are naturally rich in protein and omega-3 essential fatty acids to help support healthy skin and coat and provide major chewing satisfaction. It is a natural chew that helps your dog's gums to be 'brushed' as it is made extruded beef collagen and naturally dried cod skin. If your dog's teeth are not regularly brushed, you may experience some gum bleeding with their first chew. This is natural and is actually a benefit as the chews surface is 'scrubbing' the gum line. With continued use and additional chews, you will see a difference in the health of your dog's gum line and whiter teeth. Both you and your veterinarian will be pleased with the change in gum health and appearance of teeth over time. As with all dog chews, always supervise while your dog is enjoying an Icelandic+ Beef Collagen Dental Chews.