If you have a puppy or a new dog you should have at least one Kong. They come in various sizes and shapes and the ones that you can stuff with treats or the dogs meal are great. I use the bone shaped one for my dog when I leave her alone for long periods of time. I take some treats and stuff the treats in the ends of the bone; then I toss her the bone and she spends the next several minutes to hour (depending on how well I stuffed the toy) getting the treats out. This rewards the dog for chewing the toy instead of my shoes, and the dog is mentally stimulated which helps cut down on boredom and negative behavior. Plus my pup isn’t focussed on me leaving, she is focussed on the treats.