Look at a dog’s body language and you can get a pretty good idea of what’s on his mind. 
                          Your dog will let humans or other animals know he is not happy with something through 
                          his bark, growl or snarl. The dog’s body language is another method of communicating 
                          besides the vocal method. The dog wagging a tail is a sign of happiness while the showing 
                          of teeth lends itself to the dog’s aggressive nature.
                          
                          
                          In addition, a dog will mark his territory as another method of communicating with 
                          other animals. Take the example of the dog’s owner moving into a different house with 
                          a house trained dog. The dog will urinate in different areas inside the house to let 
                          himself and others know that this house is his new territory. This will happen even 
                          though the dog is trained to do his business outside the house. Scent marking is 
                          important to your pet dog. It is nothing more than the dog being confident and comfortable 
                          in the new location.
                          
                          
                          It is a natural behavior for a dog to mark areas with their scent. Everyone knows 
                          that a dog has a highly developed sense of smell. You see it all the time when you take 
                          your pet dog for a walk. They smell everything. If your dog picks up an unfamiliar scent 
                          or is in a non-recognizable area, your dog will urinate to mark his spot and feel relieved.
                          
                          
                          A dog can also spread their scent by rubbing against objects like walls and furniture. 
                          Cats also use this method of body rubbing to distribute their scent. However, dogs prefer 
                          to urinate rather than rubbing their bodies to mark their territory.
                          
                          
                          A dog will sniff around an area when in the marking mode and spray a small stream of 
                          urine toward the target area. This will leave a scent market for other dogs that happen 
                          to come by that area. It is very common for the same spot to be marked by many different 
                          dogs.
                          
                          
                          If there are many neighborhood dogs that usually roam around outside your house, it is 
                          not uncommon for your pet dog to scent mark within your house to let the other dogs know 
                          they are in his territory. Your dog is only trying to protect the territory and doesn’t 
                          know that the other dogs can’t get into the house.