Every morning I take her for a long walk and she will not do her business. As soon as we get home she makes a dash for the back yard and empties out behind a large bush there. This is interesting because there are two radically opposing reasons why dogs do this. One reason is that the owner has done an excellent job in housetraining and the other is that someone has inhumanely and improperly attempted to train the dog.
Dogs are creatures of habit.
If from the beginning they only are given opportunity to eliminate in one area, then they will want to continue using that spot. So if a dog has only used his own private toilet area, he would naturally be reluctant to go elsewhere. A second reason a dog will do this is because he was improperly housetrained. Some people erroneously think they should punish a dog when caught in the act of soiling in the house. If the dog is traumatized enough, he will avoid the mistake of eliminating in front of humans.