The best way to keep your new dog from chewing your stuff or from messing on your floor while you are away is to provide crate training for your dog. Crate training is a safe and easy way to protect both your home and your pet. Some people may think that keeping a dog in a crate is cruel. This is not true unless you keep your dog in the crate for several long hours without food or water or a restroom break. But keeping your dog in a crate for only a few hours can actually help your dog feel safe. In the wild, wolves and other wild canines often stay in a cave or den. Their cave or den protects them from predators and elements of the weather. As descendants of the wolf, dogs still carry this instinct to stay in a secure place. Ever notice your dog sleeping under the table or the bed? Or behind the furniture or in a small room, such as the bathroom during a thunderstorm? Under the porch or in a doghouse? A crate will provide your dog with the same security that the places of your home bring. In fact, most dogs who have gone through crate training often go in their crates on their own initiative.
The most important reason you should provide crate training for your dog is that keeping your dog in a crate prevents them from chewing on harmful things or getting into harmful substances when you are not home.