There are several medical issues that can interfere with potty training. Dogs with a urinary tract infection (UTI) will urinate frequently in small amounts, and will not have much control. You may also notice excessive licking of their genital region. If you notice a change in the consistency of their stool, the cause could be a gastrointestinal issue. Some common causes in puppies are intestinal parasites, having eaten something not in their normal diet, or a sudden food change. If a food change is necessary, do it gradually over 5 to 7 days. If you suspect any of these issues could be a problem, you should consult with your veterinarian.
Even if you try to transition to the outdoors, your puppy will be confused because you will likely have items resembling potty pads lying around the house. Do you have pillows? Blankets? Sheets? Rugs? It’s not a stretch to think that your puppy, or an older dog, even, may confuse one or more of these items with plushy, soft potty pads and decide it would rather go there than outdoors. Just save yourself the headache and don’t use puppy pads.
Accidents will happen, and it’s important to clean them up thoroughly. Dogs are attracted to spots that they’ve used previously, and remember that their sense of smell is way better than ours. Pet urine can be hard to get out, and not all household products will effectively remove odors. If your dog keeps going in the same spot chances are some of that smell has been left behind. You can opt for a product that’s formulated for removing pet urine odors & stains.
Unless you plan to keep your dog outdoors--and few of us do because it's not recommended--you'll need to teach your dog where to eliminate. Therefore, house training (also called housebreaking or potty training) is one of the first things you need to work on with your dog. Crate training can be a very helpful part of the training process. This includes house training as well as many other areas of training: