If your dog is younger or is a nervous gnawer, you should look into the fabric-free options. Some sofa beds still have the general shape of a sofa - low-slung with legs and one open side - but are not upholstered or covered with fabric.
The excellent attribute of these minimalist sofa beds is that they blend very well with contemporary or modern aesthetics. They also are almost entirely smell-free, as there's no foam core to worry about your dog soiling. For cleaning, many of these beds can be taken out back and hosed down. Now that's convenience!
Usually set on a metal frame, the bed has a hammock made of either stain- and water-resistant material that your pet sleeps on. Also referred to as a cot-style pet bed, these sofa beds have the benefit of keeping your dog cool, making them an excellent choice for long-haired dogs or ones who are most comfortable in colder climes, like St. Bernards.
Although these beds may not stop your furry friend from chewing on the metal frame, it will show far less damage than a softer mattress might. If you feel as if your dog might get cold while sleeping on this type of spare bed, you can add a blanket.