No she hasn’t laid any eggs for about a week and I haven’t seen anything else from her. We live in Virginia.None of the other chickens are experiencing these things.
I'd suspect heat stress...is she panting too?
I'd give a dose of electrolytes to them all(see below).
When I have a bird acting off I isolate bird in a wire cage within the coop for a day or two....so I can closely monitor their intake of food and water, crop function(checking at night and in morning before providing more feed), and their poops. Feel their abdomen, from below vent to between legs, for squishy or hard swelling. Check for external parasites or any other abnormalities.
Best to put crate right in coop or run so bird is still 'with' the flock.
I like to use a fold-able wire dog crate (24"L x 18"W x 21"H) with smaller mesh(1x2) on bottom of crate under tray.
Then you can put tray underneath crate to better observe droppings without it being stepped in. If smaller mesh is carefully installed, tray can still be used inside crate.
Hot Weather Stuff:
Deep all day shade is best but....I don't have much of that.
This has worked very well to keep heat stress/stroke at bay:
I give a dose of Sav-a-Chick electrolytes/vitamins about once a week during heat waves.
It really seems to help....started this after they saved a heat stroked hen once.
Can mix up a smaller amount, just wrap the packet tight and store in a dry cool place. Always have plain water available too.
BIG(9x14x2") chunks of ice last all day for wading, sitting, and sipping. Much more useful to the chickens than frozen foods and treats.