Chicken (17 month old) started out with keeping her eye shut a week ago. Her eye now looks like this. We started treating with boric acid thinking she had conjunctivitis with no improvement. I moved on to Vetericyn Opthalmic gel and no improvement. I read in a different article I could use colloidal silver in her eye but am afraid to do anything else until I have a better idea of what is going on. She has been segregated from the flock and she just sits on her perch and sleeps. She does some foraging when I let her out but she is not as active. The eyelid is not swollen and I cannot see any worms. Any help is appreciated.