It can be very hard to train a dog to not use the restroom on your rug, tear up your favorite sneakers, or bark uncontrollably on Saturday morning; however, it is possible to train a dog. I am almost to my breaking point with my roommate's furry friend. She is the most stubborn, hard-headed dog I have ever been around in my entire life. It may or may not be too late to change the 4-legged noise box's behavior. These training tips could definitely help.