I don't know. It was dark when I fed them before work this morning and dark when I got home from work. I did put the light on and took the lid off the digging box but I couldn't tell if they have been in there or not. I put shredded paper in there to start with.
I need to clean them out tomorrow so may pop them in there so they know it is OK.
It is an awesome box. Thank you Natalie for letting me have it at such a reasonable price. It's so well made. I have told the buns very firmly that they are not to eat it. Your buns are so good - I can't see any nibbles at all. Mine are currently eating part of their hutch.
When I had a group of six bunnies they literally did eat the legs of their double hutch and I had to prop it up on bricks. Then they chewed the door. (I didn't keep six bunnies in one hutch - they had two double hutches to choose from and slept in different combinations each night - but it never broke their bond).