The best dog toys in one quality and convenient set! East to Western's Duck and Octopus Dog Toy Set contains 1 - Blue and Yellow Plush, Crinkle, Squeaky Octopus Dog Toy and 1 - Yellow, Stuffing-Free Body, Crinkle, Squeaky Duck Dog Toy. - Both toys are made from tougher, more durable fabric material than the average soft toy and are suitable for dogs and puppies of all breeds, all sizes, and all ages. - The bright, attractive blue and yellow colors of our dog toy set are scientifically the most visually stimulating and most chosen colors by dogs. In 1989, Visual Neuroscience* published the scientific research of Ophthalmologist and Research Scientist, Jay Neitz, and his colleagues of the University of California, Santa Barbara, who discovered that dogs have dichromatic vision. While humans' eyes have 3 types of cones, which allow us to see all the colors of the rainbow; Dogs' eyes have only 2 types of cones, which allow them to only see shades of blue and yellow. East to Western knows dogs and produces toys that we know your dogs will enjoy and see in full vibrant color! - While no dog toy is truly indestructible, our dog toy set combines dogs' favorite soft toy textures while also being strong enough to withstand higher energy playtime with its reinforced fabric and stitching. - Both dog toys contain squeakers and crinkle material which provide the perfect audible stimulation for dogs. Our dog toy set is great for relieving anxiety; solving boredom; providing fun, comforting, calming, and engaging entertainment; dispelling energy; and cleaning teeth! The dog toy set that is both cuddly and fun. Our East to Western's Duck and Octopus Dog Toy Set is the perfect choice for all dogs and all dog parents. They are also machine washable! *Visual Neuroscience is a gold open access International Journal for Experimental and Theoretical Research on Biological Mechanisms of Vision published by Cambridge University Press