Adding Earthworms to Coop Bedding?

[Toad9000]

Has anyone tried adding earthworms directly to coop bedding? I have 5 Khaki Campbells in a ~5x5' coop. Linoleum flooring with deep litter pine shavings on top. I had a good number of nightcrawlers left over from a fishing trip the other day, and I figured I'd toss them in the coop. Thought process being that they can help break down the lower layers of bedding and that they might also help clean up after the ducks. And every once in a while, one or two might surface and be a nice little snack for the ducks. Has anyone else tried doing this and seen any success? My ducks spill enough water that I'm not worried about the things drying out.