Dog Toys For Large Dogs Aggressive Chewers are specialized design for large dogs. Innovative Cactus shape is designed to increase the durability and strength. It has been tested& approved by Alaskan golden retriever, German shepherd, Labrador and many other aggressive large chewer dogs. Dog Toys For Large Dogs Aggressive Chewers are made of 100% eco-friendly natural rubber, non-toxic, BPA-free, which is safe for dogs.