I'm buying a second Serta bed in size small for my 13-lb terrier/schnauzer mix. This bed is the first one she has not destroyed despite having it for several months now. Granted, she's now 3 years old, so maybe she might have pulled out all the stuffing if she were younger. She has chewed a little on one corner and pulled out some stuffing there, but it really still looks good and she loves to hang out in it. She usually sleeps curled up in a ball; but, on this one, she likes to prop her head on the side. Since this one has become an accepted piece of furniture in the master bathroom while her formerly plush mat in the breakfast room is totally flat and torn up, the new one will replace that ugly thing. The only thing that would make this one better would be if all 4 sides were closed in. We place the open side next to a wall/cabinet, so that works to make her feel cozy.