Don’t ever think that a dog is a lost cause. Always remember that with some effort a dog can surely be trained t the owner’s desire. There is a reason why dogs are man’s best friend and have been for many years. They are very loyal companions that would love nothing more than to please their master, in most cases, until the owner breaks the trust of the dog for some reason. You can surely do it, just apply some of the above training techniques. Good luck!