**Side note: I purchased diatomaceous earth to add to their feed and coop, and they regularly have ACV in their water.My chickens have a bad cold or some kind of respiratory illness going on. I've treated with medicated feed (did nothing), rx medicine from the feed store that the owner had for her chickens (kind of worked), and now I'm trying garlic and oil of oregano in their water. One of my pullets started acting lethargic and died 2 days later and now another is acting the same way. I have moved her inside to monitor more and help as much as I can, but I'm not sure what more I can do. Half of my flock has stopped laying. We are adding 26 more chicks to our flock in April so I really need to get these ladies healthy soon! Any and all advice is appreciated!