Why dog need toys? 1.Your dog is a puppy. The age of a dog can make it more prone to chewing. Like the human baby with teething toys, puppies often chew, while their children’s teeth drop and the teeth grow older than adults. 2. Dogs just want to have fun. This may seem obvious, but that is true: dogs enjoy the act of chewing. Like a dental version, it’s a game that never gets tired. 3. Your Dog is Seeking Comfort Rover cannot always chew with joy. Many dogs show obsessive chewing behavior when they are worried. If your dog chews mostly when you are absent, he may have a feeling of separation.