No idea, I used to line Barney's cage with blankets but he would dig them up and sleep on the floor :roll:
I've tried lining carriers with blankets or hay, both get weed on.
Tunnels get destroyed, and Annabelle took to weeing in them.
Then I bought them a cut cube bed/toy and they weed in that too!
In the end I gave up :lol: they have hiding places of course but they just have the foam tiles to sleep on now.
(Oh and just in case you didnt know, shavings aren't reccommended as they are thought to cause damage to small animals' livers and lungs, its a controversial issue. Plus they STINK indoors when weed on, dont know how you stand them! :lol: )