3+ week old RIR pullet. I put the brooder on the screened porch this afternoon (yes, a little spoiled) so they could enjoy some outside time and noticed that one was a little puffed, but attributed that to the fact that it was a little cool & breezy. Everyone else, even one less feathered, was fine. I put up a windbreak and left them alone. This evening when I brought them in and the RIR was still puffed, went straight to the heat lamp, and stood, puffed up, eyes closing, and I noticed frequent head shaking. Per some other threads I felt her crop and it was fairly soft, probably marble sized, and when I massaged it a little it pretty much disappeared. I tried giving her olive oil but she didn't like it one bit. I put some new poultry grit in and she went right to it and ate. That was before I read to withhold food. I also pulled out and refilled the waterer and she was the first one to it drinking (a bunch of shavings in it but it had clean water there). She then went on to eat some crumble. She is now back standing under the heat lamp with her eyes closing...and her head tucked under her wing. Is it a good sign that she was hungry? Or should I remove her? This was all in the span of about 15 minutes so I'm learning on the fly here. Everyone else is fine. Edited waterer info - had missed a few words!