Umarani, R.Vairavasamy, K.Puvarajan, B.Muruganandan, B.TANUVAS2018-07-132018-07-132007-12http://krishikosh.egranth.ac.in/handle/1/5810060128Mechanical obstruction of the esophagus and interference with propulsion of ingesta into the stomach may result from inherent disorders of esophageal function. A frequent sequel to chronic partial obstruction is megaesophagus proximal to the lesion (Fingeroth, 1993). The present case report deals with regional megaesophagus due to persistent right aortic arch in a pup.en-USVeterinary ScienceVeterinary Public HealthArticle