I'm sure someone more knowledgeable will be along, but I'd discontinue antibiotics, and start her on some brobiotics. You can add them to her water and give her a small amount of plain, unsweetened yogurt, with live cultures, each day.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
You can buy prebiotic especially for chickens at Tractor Supply or any farm supply store. If there is nothing in your area, check out Amazon.Do you have a particular type, strength, etc. probiotic that is suitable for her? There are several choices at the drug store with varying concentrations.
Thank you Janiedoe.