It seems logical that a thick bed will be the most luxurious, but that’s not always the case. You’ll find beds up to 8 inches thick and sometimes even more. But it comes down to your dog’s specific needs. If you’re putting a 12-pound dog on an 8-inch thick bed, they won’t benefit from that squish. At the same time, too thick of a fiberfill bed and you’re just adding more material inside to get bunched up and misshapen. A thick bed is nice, but don’t go overboard for what you need. And, if it needs to fit in a dog pen or u003ca href=u0022https://www.popsci.com/story/reviews/best-dog-house/u0022u003edog houseu003c/au003e, there are additional space considerations.