Good morning BYC! So I have a 4 yo hen that I noticed is having trouble breathing. It's not extremely labored, but its noticeable. She is currently on metronidazole for what I believe is canker. I dosed her with baytril 10%, but it's a year expired. I went to grab my Tylan, but it too is expired (3 years). I live in the great state of California and apparently I cant get it anymore without an RX. What else can I give her?? She shows no signs of upper respiratory problems. She had a nasty odor and yellow cheese plaques in her mouth so I assumed canker and started 250 metronidazole 2 days ago. Last night I noticed her lung crackles. Any suggestions for medice?? @dawg53 @casportpony You guys have helped me so much in the past and have kept my hens alive with your advice. What would you guys recommend??