Mycoplasma... What a horrible word... I've been extremely busy this week with Dr's visits, Vet's visits, setting up a booth at the fair for a club that I'm involved in, and working a part time job. So I've only seen my flock in the dark all week. Usually, I'm out there all the time but not this week. So I was out in my brooder pen the other night at 1am cause that's when I finally got home. I kept hearing this strange honk in my chicken house. Having never heard a chicken cough, I didn't realize what it was. So, I'm running around the next day and get home around 5:30pm and find one of my adolescent Delaware pullets DEAD. And I'm hearing honking everywhere. I'm looking at my flock and notice yucky eyes, snotty noses, sneezing and coughing. So immediately, I put antibiotic and sulfa medication in the water because I had no idea what was happening. I called one of my friends and she said that she would bring a bottle of Tylan over and we would inject everyone with the antibiotic. I also sprayed my whole barn with bleach solution, stripped the bedding and sprayed the floors, sprayed the dirt in my runs... Everything! After figuring out what my birds have, I am so angry with myself. I brought this into my flock by purchasing adult birds from someone. And I quarantined them and everything. Apparently it can lie dormant and shed from a contaminated chicken's system at any time. There is a vaccination for it that can be given between 1 & 10 weeks before a bird is exposed. So I guess I'm gonna have to vaccinate any chicks that I ever bring here. As well as bleach my building really often to try to kill this. Does anyone have experience with this? Advice?