I'm new here and I have a problem. 2 of my cockerels are sick and 2 hens are currently sick. Some are worse than others, there symptoms are clear mucus coming out of their nose, foamy eye, their eyes are starting to swell, they sneeze, and they have a raspy sound when they breath sometimes. I am planning to give them Tylan 50 in the injection form but if anybody has any thoughts on what it is please tell me. Also if there are alternatives instead of tylan 50 that would work better. Thanks.