My little Sadie's dog bed is absolutly falling  apart and has been for yr now and she would not give it no matter what I offered her . I could hardly wait for the calming dog bed to arrive.Now I know it's a sofa  protector cover but we have it on the floor .My girl is only 10 lbs but I got the med. size as she Loves to stretch out to her fullest but she loves to be cozy at times and  this bed is absolutely super for her and she took to it like a fish to water I'm so happy as her old bed is filthy and the bottom is all torn away .My idea is to buy a thick piece of foam and put it under the bed for more comfort.