There are a number of reasons why dogs might have chewed the wall in your house, so let’s take a look at some of them.  The first reason is boredom, if you’re not giving your dog enough attention, then they might just act up as a way of gaining attention, even if it's negative attention.  Another reason why a dog might chew the walls is anxiety. Whether they’re home alone, or can just hear frightening noises, like fireworks, they might resort to chewing the nearest thing they can find for some comfort.  Finally, if your dog is a puppy, then chewing the walls is a way for them to relieve the pain of their growing teeth, so try to provide them with plenty of chew toys to help save your walls in the future.