"Some dogs prefer rectangular dog beds, while others, especially those who curl up to sleep, may prefer round or oval beds instead. Dogs who like to sprawl out when they rest often enjoy the flat comfort and space of a rectangular dog bed, just as we enjoy the spacious comfort of our own rectangular mattresses."
"The best styles of rectangular dog beds, for many dogs, are pillow dog beds and bolstered sofa dog beds because of their roomy design and easy comfort. Elevated rectangular dog beds can be another good choice, especially for outdoor use and those in warmer climates. Overall, however, orthopedic rectangular dog beds are generally considered the best, owing to their memory foam construction, which provides maximum comfort, firm support and pressure point relief."
"Rectangular dog beds can be better for larger breed dogs, especially for those who like to spread out when they sleep. A large mattress-style rectangular bed will provide your big buddy with plenty of room to sprawl, and you can even get one with bolstered sides for a bit of added support and comfort. Of course, every dog is different, and your large breed dog may prefer a cuddler bed, a round cushion or even a covered dog bed for coziness and privacy."