Megaesophagus is an enlargement of the esophagus, the tube that connects the throat to the stomach. In dogs with megaesophagus, the muscles of the esophagus, either through genetic defect or aging, are unable to affect peristalsis. The result is that dogs with this affliction regurgitate their food and are at risk for aspiration pneumonia if food or liquid enters the lungs. Let people know about your dog's special needs with this functional and attractive Pet ID tag.  These dog tags for collars are important to you and your pet, as you don't want anyone to accidentally sneak them a treat.