I have two 5 month old Cochin pullets. They are squinting or closing their eyes. There is a slight white discharge coming from one of the eyes. Could this be conjuntivitis. They are also rubbing and scratching there eyes. They are reluntant to go into the sun light and are staying in the coop. They are eating little to nothing. I gave some sugar water and am going to give yogurt. I have isolated them. They are on 6 inch deep dry white sand for litter. I rake it daily and there is not an ammonia smell. Also could this be eye worms? The chicken health handbook says to treat with 3 drops of ivermectin (which I have) twice daily in each eye but not for how long. Any help would be greatly appreciated.