i have a few chickens that there eyes are watery and look like they have bubbles around them. Looks like they are going blind. What could be the problem? I did have mites a couple days ago but i dusted them and now the mites are gone and now i have this problem. My eggs production has been way down for a week or so. 20 hens only got 2 eggs yesterday so something is going wrong. Plz help.