Have you added any new birds to your flock recently? The swelling and foam in her right eye could be a sign of MG, a common respiratory disease in poultry. She may have already been harboring MG since you inherited them. What antibiotic did the vet prescribe? You can try to get Tylosin powder from Jedds.com to treat MG symptoms. Denagard is also used by some. The other eye looks red which is common with conjunctivitis, another MG symptom. While you are waiting for the antibiotics to arrive, I would flush her eye with saline or Bausch and Lomb Eye Relief eye wash twice a day. Apply either the Terramycin or plain Neosporin triple antibiotic ointment twice a day. I would separate her inside a wire dog crate with her own food and water, but leave her near her flock for comfort. Also take her aside twice a day and give her a small bowl of wet chicken feed and some bits of soft cooked egg. She probably cannot see well, and respiratory diseases will make them lethargic.
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