Do they use their wheel (i.e. it’s not stuck or some how doesn’t work for them)? The last time I heard of dust makers the guy said wheels fixed the problem for him. I've been lucky and mine haven't started doing that. I have them in the big Home Depot concrete mixing tubs and have yet to find a low enough profile wheel but they have wood blocks to chew (and they use them) and lots of room and they climb on the bottom of the hardware mesh. Actually they have to jump up a bit to get to the top where the food is so maybe that helps keep down idle food wasting.

I wonder if it helps at all that I also give a little bird seed daily. The guy I got them from reported that the babies grow faster with some seed and they seem to like it even though they always have the Mazuri 6F available. Maybe there is some extra thing they crave from the seeds? I just brought back a bucket of soybeans from my dad’s farm so will be interesting to see how they like that as a treat.