One of my baby chick is keeping it's eye closed and it's swollen. She also stays away from everyone else now. It happened yesterday because the day before that she was fine. What's wrong with her and what can I do to fix it?
If she is just days old, it is probably from a peck to her eye. Look into it for any dirt or bedding, gently open the eye and put some saline eye drops in to wash it out. If it starts draining or she keeps it closed, get some Terramycin Eye Drops or Vetericyn Eye Gel from your feed store.Those are pricey, and I have used plain Neosporin in my chicken's eye without a problem, but those 2 products are specifically for eyes.
That is the third eyelid or nictitating membrane, which helps protect the eye from dust and dirt. It can look opaque and gray, but there could be a mucus or pus in there. Keep opening it so that it doesn't crust together, snd keep it clean.