I've had this happen to one chicken before. It killed her. It's like a huge growth/abscess where the crop/breast is. Also, when she bends over to drink liquid seems to come out of her mouth. I separated her from the rest of the flock, and then gave her electrolytes, water, and food. It's hot out, so I hope she doesn't suffer. She currently is standing in the shade. She acts like she can't sit down. What is this and how can I help her?