Ranjithkumar, M.Thilagar, M.B.Gopalakrishnan, A.Sumathi, D.Pushkinraj, H.Jayathangaraj, M.G.TANUVAS2018-05-232018-05-232018-05http://krishikosh.egranth.ac.in/handle/1/5810047398TNV_IVJ_2018_95(5)81-82Two dogs aged one and 4 years were reported with the history of severe respiratory distress, retching and lateral recumbency. On physical examination, there was hyperechoic resonance during percussion. Radiographic examination con rmed the cases with elevated cardiac silhouette from sternum and atelectic lung lobes. Thoracocentesis was carried on emergency basis initially at 8th and 11th intercostals space and twice at 12 hour interval. Both dogs recovered clinically from second day onwards. Complete recovery without any recurrence was observed from third day onwards. Spontaneous pneumothorax without any history of trauma in two adult dogs and its successful medical management is reported.enVeterinary ScienceArticle