I couldn't find the Tylan. ARRGGGH!!!! Our TSC is so annoying!!!! I'm going to try the oxine and cont' the Duramycin.
speckledhen, you are probably right. But I really couldn't kill this bird! She is quite young too....I'd never breed her though.
This is similar to my own situation, perfectly healthy but sneezing occasionally and one hen has a bubbly eye. Their coop isn't as clean as i would like, doesn't smell very badly. They always have clean water.