I checked out special dog beds but they did not seem to have much more padding than the memory foam and blankets our dogs sleep on now. Also, prices were high! Because Misty limps in the morning I really wanted to provide more padding under her bed as their room is tiled with rugs.
Perfect solution was found in the camping section of Walmart. I purchased two $9 foam camping mats that go under a sleeping bag. Long and skinny so I got two to lay side by side.
Noticeably less limping when she gets up, and two very happy dogs laying flat out on their now softer beds. Lots of snoring going on!
Sounds like the perfect solution