THANK YOU for all of the wonderful information on this site! It truly is a life saver!! I have had chickens for about a year and have done alot of trial by error learning with them. They started seezing and weezing a few months ago and in trying to make them well I found that there is not alot of credible information out there. I stumbled across this forum by accident and find that I cant stop reading!! LOL I had been giving them tetracyclene as recommended by the local feed store but it was not working so back to the computer I went because my favorite roo was sounding like darth vader when i went to the coop on wed. I...thats when I found a thread on Tylan!!! I have to say its working!!!!! I thought I was going to lose them all so I cant say it enough THANK YOU for the excellent advice here!!!