I would take her aside and let her eat her fill in a special area. Dog crates (wire) with food and water are good. Scrambled egg is good for a treat. If she is getting a balanced chicken layer or all flock feed, she should not need extra vitamins or be deficient. Have you seen any bubbles or foam in her eye when using the saline or Terramycin? If her eyelid is swollen, Tylan 50 given orally, or tylosin powder in the water might be helpful.