A four-years-old female cocker spaniel dog was presented with a history of vomiting and tenesmus for the last six days. There was no defecation, only freshblood was coming from rectum and the animal was taking only a few sips of water for last two days. Physical examination revealed that the animal was dehydrated. Tenderness was appreciable on abdominal palpation while a firm, painful mass was felt in the mid-caudal abdomen. The clinical history and physical examination was suggestive of intestinal intussusception. Later on an ultrasound examination revealed a sausage-shaped mass with folded layers of intestinal wall. The intussusception was found to be ileocolic on laparotomy. Resection and end-to-end anastomosis was performed. Intussusception is commonly observed in puppies < 1 year of age, less commonly in cocker spaniels.