We haven’t tried this service yet but for those looking for a special bed for their older dog, Memory Foam Warehouse, UK manufacturer of memory foam mattresses and pillows offer a bespoke dog bed service.  If your dog suffers from arthritis or hip dysplasia, a memory foam or orthopedic mattress dog bed is the best option.  I would recommend this type of bed for most older large breeds as it supports their joints and muscles.  Memory foam warehouse will make the bed specifically to your dog’s measurements and provide a washable cover.