I have been doing a lot of reading and am so so confused and upset. So let me get this straight. Is all respiratory illness CRD? I have a chicken that had a slight gurgle. I immed. seperated her to my back porch and started antibiotics. She had no other symptoms that I could see. Eyes were clear, no runny nose. no sneezing, poops were and still are normal. She was eating but I could tell she wasn't herself. She is a leg horn and usually quite skittish She still ran from me but wasn't her sassy self. I quarenteened (?) her on the 26th. The morning I heard her. Now will all my chickens get sick and be carriers so I can never add to my flock. I was so enjoying having them till now.