I would add save a chick to their water and some tetracycline powder to add to water. Then after adding that and if you have another one die then I would switch to tylan 200. I add 1cc of tylan 200 injectable to quart of water. So if it is gallon that is 4 cc. You have to do something or all of them is going to die. I was boil eggs and mash them shells and all with some oatmeal and feed them that to get their nutrition up. I have even added tetracycline powder to crushed eggs and oatmeal for them to eat to get more medicine in them when I get sick birds.