We put one of the bunnies treats (Timothy hay cubes) in a separate box, just to try to keep the hay dust factor on the lower side. They still carry them off sometimes and we find them when we step on them. Not quite as bad as a Lego.
Here's a video of Bunya and Lucy munching this treat that they all love. Bunya keeps his head down, but Lucy shows us how a bunny chews, which I still find amusing. Near the end, she slows down and then goes to intermittent before deciding I might try to pick her up so she'd better hop out and leave.
Bunya never breaks his hay cube munching stride.