It may sound like something from the 1970s or 1980s, but if you’re looking for pet beds for a dog, then why not consider a water bed? Yes, you heard right. Even though humans have mostly abandoned this kind of bed in the past decade or two, it may still be an option for their pets. And the idea may not be as far-fetched or as novelty-seeking as you might think. Water beds can actually serve as orthopedic dog beds for very particular types of ailments.