Signs include gagging, coughing, and regurgitating. Most often it is from eating grain too rapidly or it may be due to the type of grain being fed. Pellets should be rather hard and small in diameter. Feeding management can help immensely by feeding in long troughs rather than in deep dishes which enables them to get large mouthfuls. You can help work it out with upward movements on the neck area. A more serious disorder which may have choking signs is Megaesophagus. See Coanal Atresia