So I think one of my chickens has Coryza after reading some of the posts on here about it. Both sides of its face are swollen to where its eyes are closed and yellow stuff is leaking from its eyes and nose. Also it has just been acting like it is about to die. I seperated it from the other chickens and looked on here for what to do about treatment. I bought some Tylan 50, a 3cc luer slip syringe, and a 20G x 1/2" needle. First, are these the right size for syringe and needles? Second, how much of the Tylan 50 should I give and how often? And how long should I keep it seperated from the other chickens? When should I see improvement? Any advice would be wonderful! Thanks in advance!