I have a cochin hen that just started laying 4 weeks ago. Few days ago I noticed she sneezed and then today its a cough. No nasal drainage, no eye problems, diarrhea maybe,not sure it was her. No blood in it. She is eating and drinking, acting the same. But, I want to treat this fast. Someone told me about Ty lan 50 inj in breast 3/4 - 1 cc for 5 days. I can do that, just need to know where to get the Tylan. Can it be picked up at the feed store? Or where? Also is this the best way or should I try the powder in water and treat them all. 7 Hens. All about the same age. ONly one with the cough.