Yes. Potting soil with no fertilizers would work well. You could mix with sand.
If you want to save their lungs, ditch the DE. That is ground shells of diatoms made up of primarily silica. You can check the internet for cases of silicosis caused lung disorders for both man and beast.
I won't...
They probably don't like the smell of the peat moss or herbs.
I simply buy playground sand from the local grocery store garden aisle and add a bit of dirt.
Skip the herbs and smellier stuff. Peat doesn't likely act like soil they want.
LofMc