Is her eye draining or having crust around the eye? Respiratory diseases can cause conjunctivitis or sinus infection. The Vetericyn eye gel is a good thing to use, or Terramycin eye ointment twice a day. If you see gunk, crust, or pus in the eye, rinse with saline before applying the Vetericyn. If there is any sneezing, wheezing, gasping, or noisy breathing, then I would suspect mycoplasma (MG,) or other respiratory infection. Tylan 50 injectable from many feed stores 0.2 ml per pound can be given orally or by injection twice daily for 5 days to treat symptoms. A vet or local county extension agent may be able to test for common diseases.