Our 3 year old pit bull girl, Jazzy LOVES her bed. We call it her "Oyster Shell" and other members of the family have called it her muffin or burger. She climbs right inside and depending on her purpose for going in sometimes her face is visible and otehr times she can't even be seen! This bed was worth every penny. Jazzy loves her oyster shell and we anticipate on this being her favorite place in the colder months. Jazzy is 55lbs and a medium sized bed would have been more than large enough. We got the large and she loves it and it is a great alternative to her sleeping with us, as anyone with a pitbull knows that they spread out on the whole bed and love to be under the covers while on a ankle, foot or thigh.