My chicken is acting sick today and I checked her over and she has a large soft bulge on top of her chest. Is this where they get their food stuck in route to stomach? I can't remember the name of condition. I always thought it would be in the neck ??? Do I gently try to mush it down? She is still making droppings but is quite skinny (other than bulge) she's a very fluffy chicken so I didn't notice until checking her over.