- have a bunch of young cochin's they are around 3 months old and I have a white Leghorn shes around the same age.i noticed a few days ago that the Leghorn's eye was swollen shut ( just 1 eye) and she sounded crackling when she would breath, so I put some antibiotics ointment on her eye, then the next day 1 of the cochin's also had 1 swollen eye and alil discharge from her nose, so I started them on Corid in the water so after 2 days they still haven't got any better and now i have 2 more cochin's with their eye swollen shut..idk what to do or what to give them. I have Corid and an antibiotic called Neomycin/Polymyxin eye cream, I also have Noromycin but idk how much to give them or even if I can.