Fluffed up and listless you treat the whole brooder for coccidia, using Corid or Sulmet. Antibiotics will not help. It is a microorganism not an infection.
Rinda,
When treating with these, are the eggs inedible, as they are with antibiotics? I have a brown leghorn, in my general laying flock, that I just noticed, this morning, looking this way. Everyone else seems happy and healthy, but she's a bit listless. Usually the first off the roost, first out the door, and first to fly out of the pen, to go free-ranging, in the mornings. Today, she just seemed like she preferred to wait on everyone else, to go ahead of her. Her wings are hanging a little low, and her tail is not held high, like normal. She's not fluffed up, but certainly not herself. With 70 layers in the coop, and she being the fastest of the flock, catching her, to isolate her, might be a bit of a job. And, telling which poop is hers, unless I see her actually poop, is also difficult, under those circumstances.
On the other hand, could it be loneliness? Her best buddy, another brown leghorn, that we got at the same time, and they grew up together, as best pals, disappeared, presumably to a hawk, this past weekend. The two of them hung out together since hatching, and now, there's just the one?