Summarize the following:
If your veterinarian has identified a medical condition that requires special treatment, medication, or other interventions, make sure that you follow the veterinarian's instructions. If your dog's elimination problems are related to a medical condition, they will not improve until he is cured. Contact your veterinarian immediately if your dog's condition worsens or does not improve despite treatment. You can get your dog to stop eliminating inside the house by gradually introducing grass to the type of surface your dog prefers to use. For example, if your dog prefers to urinate on carpet, place a piece of carpet or a small rug in your back yard. Allow your dog to use the rug, but add a handful of grass to the carpet every day. When the carpet is completely covered in grass and your dog is still using it, remove the carpet. Your dog should be used to using a grassy surface and continue eliminating on the grass. Simple changes to your daily routine or to your dog's environment may help to ease some of his fears and anxieties. After you have identified the source of your dog's fear, you can take steps to try to eliminate or reduce it. For example, if your dog is frightened by the sound of passing cars when you take him out for a walk, try taking a quieter route or taking your walk at a time of day when there is less traffic. Some dogs just don't like to go outside when the weather is bad. You can help make the experience more tolerable for your dog by getting cold and/or wet weather gear for your dog. For example, if your dog does not like the feel of his paws in the snow, consider getting some boots for your dog to wear when you take him outside. Or, if your dog doesn't like to get wet, consider getting him a raincoat to wear when it is raining. Some dogs have multiple reasons for why they are not housebroken or why they begin eliminating in the house after years of going outside. If your dog does not respond to your housebreaking efforts and there is no medical reason for your dog's issues, you may want to consider hiring a certified professional dog trainer to help you housebreak your adult dog.
Follow your veterinarian's instructions for treating any medical issues. Work to change your dog's surface preference to grass. Ease your dog's fear and anxiety about going outside. Consider getting cold and/or wet weather gear for your dog. Consider getting help from a certified professional dog trainer.