That's mine too...I just wish they'd eat fire ants, but nope...they won't touch those either .My two Eggers loved earthworms when they were chicks and first allowed to explore outside! But over time I guess they got jaded or picky , and also "turn their beaks up" at worms. The older pullets are pretty much, "Meh" about worms.
But sowbugs, spiders on the wire fence, or swarms of carpenter ants -- WOWZA! Everyone's leaping around and snapping up those delicacies at lightning speed!
That's fine, I'm happy to leave the worms to do their excellent soil improvement work instead.