My dogs wont get along at all! help please! D:?

have a tried to exchange the scent glands from one dog to the next? u can do this urself by rubbing the sides of one dogs face then to the other,get a spray bottle to spray at the dog that is out of control or nipping,,,try that but give it time to see if they will tolerate each other,if not after awhile then i would swap the dog with ur brother or who ever