The Braided Knot Bumper is great for games of tug of war with tough chewers. Twisted Chews help keep your dog's teeth and gums clean and healthy. Unlike humans, dogs only have two cones in their eyes, causing them to see a limited pallet of colors. Blue is the darkest color they can see and yellow is the lightest. By making our toys blue and yellow, your dog sees great contrast and can find them easier