This morning when I let my flock out one of my 8 week olds had a foamy eye. I separated her and she seems to have been declining all day. She seems thinner has slept most of the day. Has not moved much, ate and drank a little. I gave her some super worms for a treat and she ate them all. I also cleaned her eye with a warm compress. Her poops seem a little soft. One was runny. She was in good health until this morning. There is crushed limestone in the bottom of the hen house and my 6 chicken flock free ranges all day on half an acre lawn. The other chickens seem fine. I added Apple cider vinegar to all the waterers today. I'm very new to chickens and have no experience with diagnosing or treating them. So I could use all the advice I can get. Thanks. I added pics of her and her runny poop.