She has a bit of swelling near her eye. How does the eye itself look? Any bubbles or drainage? Head shaking can be a sign of respiratory infection or a disease such as mycoplasma (MG.) How is she breathing, and do you see any cough or sneeze? Get her drinking some water. Look at her droppings, feel of her crop for fullness or if it is puffy.
DE is really not something I would use on chickens because of it's irritation to eyes and breathing. Since you have not yet confirmed there is mites or lice, I would try to look for them first. It doesn't make since to treat for lice/mites unless you find them. Permetrhin is very safe to use in powder form or 10% liquid spray in treating for them as well as treating a coop.
DE is really not something I would use on chickens because of it's irritation to eyes and breathing. Since you have not yet confirmed there is mites or lice, I would try to look for them first. It doesn't make since to treat for lice/mites unless you find them. Permetrhin is very safe to use in powder form or 10% liquid spray in treating for them as well as treating a coop.