That is so cute,good idea. I keep one of those egg crate mattress pads on my bed. Bet you don't know why? Thats right my two little pups sleep with us,a yourkie and a Chauhaha. Any way when they get old and lumpy that is what I do make pet beds out of them. But yours is much prettyer,I usually just buy a big piece of flannal or use left over flannal and sew a big pillow case. I may try that next time.