I have a 3 month old chick in my grow out pen who started sneezing and coughing this morning. Her eyes are clear and there is nothing coming from her nose. I immediately isolated her and started her on Tetracycline Hydrocloride. My question is this: should I treat everyone in the pen, even though no one else is showing symptoms? The weather has changed here with the nights cooler. I would appreciate any advice!
