Hi all, our Barred Rock (not sure her age)has become very lethargic, stopped laying, and acts like she is gasping for air. Also seeing foam around her beak. We tried some worm medicine (Ivermectin) but that hasn't changed things and crop doesn't seem enlarged. Acts like something stuck in her groat. She typically strains her neck much more than the attached video shows. Any ideas or guidance would be appreciated.