We have 8 grown chickens and 20 8-week-old chicks. They've all thrived... until I noticed something yesterday. One of the chicks has this large bulge on her chest area that is liquidy (not full of feed storage). When you squeeze on it this brown regurgigated food comes out of her mouth as if she's vomiting it back up. This isn't normal, is it? If it is, I've never seen it in my other chicks/chickens. What could this be?!