I lost 3 chickens yesterday that were about 3month old I'm pretty sure to coccidious. I got on here last night in a chat and was given the advice to go get Corid so I did I have treated the one chicken in the pen still alive with it. My question now is I also Have 3 week old chicks in the barn should I treat them also plus I have 8 that are about 1 yr old that we have in another pen, should I just treat everyone to be safe? Also for how long do I treat them? Thank for any advise we have only had chickens for a year this is our first dealing with any disease. So very devastating for my 10 year old to find 3 of his babies dead.