Alfalfa Pellets for a Digging Box? *Dig Box added... Pics!*

Biggest issue is molding. If you think you can control this, then you'll be fine. There would also be an issue if Duders takes to eating large quantities of the alfalfa, which could result in an imbalance or sorts. You might want to look at millet seed. Its commonly used as substrate for Uro's, and avoids many of the issues with other loose substrates.

The seeds won't be digested, but their shape allows them to easily pass through an adult beardies digestive tract. A "normal" beardie wouldn't eat to many of them...no flavor there. While not identical species, Uromastyx seem to do very well on millet seed. I wouldn't recommend a beardie have his entire enclosure covered in millet, but for a digging box, its probably the ideal substrate. No dust, reduced impaction risk for ADULT animals, and it looks "good". Zilla even makes a millet seed bedding...it can sometimes be found at stores like Petco and petsmart. You could of course use a bird seed mix that was mostly millet...some do, though note that other seeds may be included in the mix increasing the risk of digestive injury.

I've never personally used millet, or any other digging box substrate, with my beardies. Though I have thought about it for my female who has been known to scratch and dig at her tile.

Let me know how the millet seed goes.. Phred has his Yesterdays News cat litter dig box that he loves to lay in.. I change it out every 2 weeks or so. He was using it for his potty there for a bit, but now he's back to just his tub poo, and the occasional outside poo. I want to try the millet seed if it seems to work for you. Except he licks Everything, and with it being so small, I'm wondering if he would eat a mouthful.

Lots of people use that specific blend of millet bird seed for Uro's, and I've even seen them leave the sunflower seeds in :shock:
Personally, I would remove the sunflower seeds, but the millet in the mix should be fine to use. Let us know how it goes!

That last post made me chuckle =D Dudley seems like a cool dude. After reading this I think I might make mine a dig box too using the polystyrene method so I can give it little steps and stuff? My beardies are still small though so do you think it would be better if I used millet seed?

I just got Phred a new dig box today.. it was the insert to a cat litter box, so it's pretty big.. I filled it with the yesterdays news cat litter, and he loves it.. Another good Idea for a dig box, which Phred first had (until I saw this litter box thing today) is one of the aluminum cake pans (you get at Walmart) that have the alumnium bottom, then a plastic top. I used the cake pan part, and that worked really well.. except it was a little noisy when he was thrashing around