Yup - it is called Megazorb - it is manufactured as a horse bedding, something similar to carefresh, though the pieces are much smaller. It comes in huge horse-sized sacks, and works out infinitely cheaper too!
The shredded paper gets cleaned out daily. My girls love scampering through it, and (as you can see) coorying down in it. It prevents the megazorb being carried around the rest of the cage quite as much - and with regular cleaning does a good job of keeping the megazorb clean, and therefore odour down.
