It is just that she stuffed herself. Chickens do that. The chicken starring as my avatar eats so much it doesn't seem physically possible. She isn't even fat. However she does run EVERYWHERE and lay an egg every single day without fail. Marvelous chicken. Something you should be mindful of is crop impactation. If it stays stuffed, and she doesn't seem to be pooping, then try massaging her crop, and feed small amounts of yogurt mixed with olive oil. This helped one of our older (4 year) hens get over crop impactation. The next day her box (we brought her inside) was full of massive piles of poop. It is also good to mix olive oil into their food occasionally to prevent this, as after a couple days surgically removing the blockage is the only way of stopping the hen from dying. Bread is the biggest cause of crop impactation as it expands and can get stuck. By the way, the idea of massaging the crop is to loosen the blockage, and hopefully to get the hen to vomit it up. Don't be surprised if she starts gagging and opening and closing her mouth. That is a sign you are succeeding. The crop impactation info is just in case. It may happen at some point and it is better to be prepared rather than surprised.
Thanks for the information!
