Good eye on the leg band. I would remove it right away.Is her foot a little swollen? It's hard to tell in photos, but I see a leg band? Is that too tight?
Did she perk up more after she laid the egg?
I would re-check the crop first thing in the morning before she's had anything to eat/drink.
I agree getting her hydrated is a good idea. Check her for lice/mites while you are at it.