It has been a week now that our 7 month old golden buff has been lethargic, not moving around, not eating much. She sounded congested last Thursday, so we started her on Duramycin in water. She has been on this in her water for 5 days now. She is isolated from the other hens now, we are keeping her inside. She had two good days where she walked around, slowly, but did do some pecking while free ranging. Yesterday and today, now, she is not walking around, sounds congested again. There is not much poop production. She has not laid an egg in over a week. Her comb is turning purple. When she had her two good days, her comb was bright red. Any suggestions?