The puppy cannot be expected to hold its bowels or bladder well until about 12 weeks of age. You will need to get a book on potty training and adhere to its teachings. You will have to get up off your bottom and be consistent and put forth effort to have a well house broken puppy. It has been my experience that all puppies can be house broken. It is usually the new owners who have not done their job well when they are not. Expect your Havanese to be somewhat consistent at 4 months old. By nine months if you are still having accidents there has been a problem in the training.