I am a new chicken mom with 27 7 week olds and 3 4 week olds. This pic is one of the 4 week olds. She is a Buff Orp and is NOT normally this puffed up. She is REALLY poofy, I'm not sure the picture shows just how much. But she is not moving about at all. 
I have her in the house now so I can observe her but she has been like this since this morning. I have no clue what to do? Is this normal to maybe be full or something?
Please help me if you can. Thank you.

I have her in the house now so I can observe her but she has been like this since this morning. I have no clue what to do? Is this normal to maybe be full or something?
Please help me if you can. Thank you.