aS FOR THE EYE SORES YOU CAN GET SOME
prid cream
https://www.hylands.com/products/prid-drawing-salve
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well yes she may have mites,
of which you should have seen them crawling on the body.
But using the mite spray in the cleaned out nest boxes and replacing bedding and adding the diatomacious Earth in the bedding of the nest boxes.
As for the hen
I would by some BLUE KOTE and spray the sore area...