I've got chicks with Cocci. I started Sulmet yesterday in EVERYONE'S drinking water, as well as switched everyone back to the medicated food. There was one lethargic, not standing up chick and I separated her into her own tub, under a heat lamp, because she seemed cold. I thought she was doing better, when I checked her before bed, she was standing and had eaten and drank a little water. Her poops were white [and not blood] This morning, there's another chick acting similar [ruffled, dirty feathers, lethargic, not eating] I moved her to the tub with the other one. How long does this Sulmet take to work?? When should I expect the treatment to start making an improvement? ~~~~~~Also, are full grown hens more immune to it? I'm treating my hen's water, but they seem fine.