Chili has this memory foam in his crate: Amazon.com : Brindle® 4 : Pet Beds : Pet Supplies
he still has calluses tho.
when chili was an outdoor only pup his calluses disappeared from when I got him at 8 weeks. Now that he is an indoor dog with tile floors and summertime, the calluses are coming back...he just loves the tile and I keep the ac at 70. he has access to rugs/carpet/dog bed/furniture but loves the hard floor. go figure.