My sister got a dog from a pet store (McKinney--west highland terrier) and he had the same problem. For him, it was because he was used to being in a cage 24/7...so it was nothing unusual for him to soil his sleeping areas. It was very difficult to get him out of this habit. Actually, he refused to go potty outside at first. Does Murphy still go potty outside when you take him? Like we'd have him outside for the entire day, and he would NOT go...put him in a kennel for one minute and he'd let it *all* out lol. Quite annoying. We had to actually put a box with no bottom out on the grass to get him to go outside...I'm not kidding, lol. It was a lot of work. I don't think Murphy is that bad though.

It is not normal for a dog do soil his sleeping or eating areas, usually it comes natural for them to not to. However, it does happen depending on how the dog was treated.

I would do like everyone said, and treat him like you are potty training a puppy. Take him out frequently...don't give him a chance to go. Praise him lavishly when he goes outside!

If you buy a high quality dog shampoo, it shouldn't be too big of a problem to wash him frequently for now. Maybe even just squirt him off with water sometimes too.