One thing about dog beds that for sure you want to know about is if the bed is easy to maintain in good cleaning. For that, you will need to ask your vet, or the representative of your favorite pet store, if they have any washable beds for canine pets. Also, the model should be machine washable, as, no matter how much you love your pet, it is not that pretty to have wash after it.
Also, if your dog loves to chew on things, stay away from an expensive bed. You may need to change it soon, so it is important that you do not worry about the fact that the dog is ruining the bed with its teeth.