You'll need something better to occupy thier time with.
Build up some simple like wood chips piles (add some scraps too if handy) and keep it wet.
Let the birds at it after a bit of time and make more piles to rotate in.
Lots of goodies for the chicks to eat plus satisfies their incessant need to dig, dig then dig some more.
Add BSF grubs into the mix and they'll camp out there making some nice
compost as a bonus.