A two-year-old, Mongrel, intact male dog was presented to Madras Veterinary College Teaching Hospital with a complaint of postprandial regurgitation that was repeated at each meal. On physical examination, the animal was below ideal weight and with mild respiratory distress. It was suspected of megaesophagus. Thoracic contrast radiography revealed the presence of an esophageal diverticulum along with foreign bodies at the level of the base of the heart. The diverticulum was surgically corrected and the animal made an uneventful recovery. Six months follow-up did not show any recurrence of symptoms. This paper describes an acquired esophageal diverticulum in a dog. Diverticulectomy is an effective surgical technique to remove a large esophageal diverticulum and can be performed with good outcomes.