I have a dog w/feet deformities who is unable to get on/off the bed. I worried about her at night, getting cold while in a snuggle bed. This is perfect & I know she stays warm all night. I do wish I had gotten the bigger size however, as she slips to the left or right & is unable to get back up into the center. Might be better if the sides were sturdier, keeping the dog int he center.