Thanks for answering. No she does not feel impacted and her breath doesn't stink. I have added the yogurt and she has eaten some. She is holding her head up now. I will let you know.
My 7 month old hen's neck/head is just drooping. She is lethargic and just huddles. Not eating or drinking. She is an egg layer. Her poop is normal. I have 9 other chickens and they are all fine. They all normally free range but were in the coop and run yesterday because we were gone all day...