Many behaviorists and veterinarians (I’m Planet Dog Toy Fan and Seller) recommend that you have a variety of toys for your dog so you can “rotate” them. It’s easy. When your dog gets “bored” with one toy, hide it and replace it with another toy that he has not seen for a while. Let your dog play with the “new” toy like crazy, then when he gets bored with that toy, hide it and reintroduce another one. Rotating toys helps to keep things fresh and fun for your dog.The most important thing is that you choose safe toys with no “parts” that your dog can ingest. If your dog is a top-of-the-line destructive chewer, there is probably no truly SAFE toy. For these dogs, it is even more important for the owner to monitor their play. But for most dogs, good quality durable toys do the trick.