This bed is perfect for our 13 year, old man dog! The thick one piece base is very supportive. My Chesapeake Bay Retrieve has arthritis that has deformed one of his front legs. His other bed had multiple layers that would shift and half the time he was partially on the cold floor. For reference, he is 85 pounds. I'm hopeful the bolster will not shift or flatten so he'll be able to support his head if he chooses. Really impressive, well made, supportive bed for him! Thinking about a second one for the other room he spends some time in.