One hen is not well .....

[helenl]

Let my 3 girls out yesterday for a run around. They had a great time. But this morning when I came to let them out. One wouldnt, and has been just sitting in the corner of the hutch for most of the morning!!!! Seems happy enough and was happy for me o pick her up. Rear is clean and i see to messy poos .... Any answers. It has been awfully hot here, but the other 2 seem to be handling the heat well. There is no egg form her this am either, but she does not seem egg bound. Perhaps she ate something when I let her out for a run???