what is megaesophagus in dogs
Overview of Canine Megaesophagus. Megaesophagus is a condition where there is decreased or absent motility (movement, muscular contractions) of the esophagus in dogs. The esophagus is the tube that carries food and water from the throat to the dog's stomach.verview of Canine Megaesophagus. Megaesophagus is a condition where there is decreased or absent motility (movement, muscular contractions) of the esophagus in dogs. The esophagus is the tube that carries food and water from the throat to the dog's stomach.