You can also drop a few drops of the Tylan into the eye along with putting down throat or injecting under the skin (where neck/shoulders meet) It burns like heck, but can help save the eye. Also you can take a needle and drain the fluid that has built up in the sinus. Remember, respiratory infections can be HIGHLY contagious in chickens, and can spread from your cloths, shoes, hands, and fluid from other birds, so make sure to handle sick birds last, wash cloths and bleach shoes. Always separate sick birds. A pen far away from other birds, covered with shade cloth on all four sides will help minimize spreading.