The Icelandic+ Beef Collagen Dental Chews with Spiral Wrapped Fish Skin Dog Treat is a natural chew that helps your dogs gums to be brushed as it is made extruded beef collagen and naturally dried cod skin. If your dogs 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 dogs gum line and whiter teeth. People who do not floss similarly experience gum bleeding when they first start and the bleeding stops when gum health improves from flossing, as will happen with your dog. Both you and your veterinarian will be pleased with the change in gum health and appearance of teeth over time.