Cecisflock
The Backyard Brahmas
Give her corid just to be safe
EDIT- here is dosage https://www.backyardchickens.com/threads/updated-corid-and-amprol-amprolium-dosing.818879/
EDIT- here is dosage https://www.backyardchickens.com/threads/updated-corid-and-amprol-amprolium-dosing.818879/