Colic (abdominal pain) as a result of ileocaecal obstruction is not uncommon particularly in young animals. The obstruction is at an anatomically already narrowed area where the small intestine meets with the caecum and large intestine. Causes for thickening and narrowing of this area are not always apparent but there is an association with tapeworms and the irritation that they cause at this site. Once ingesta has difficulty passing through this junction, the small intestine starts to distend and so cause pain. Treatment for this condition is surgical (as well as getting rid of any tapeworms). An alternative route is created for the passage of food so by passing the ileocaecal junction.
The images show a recent case. The first picture shows the distended small intestine as a result of the obstruction. In this case as we were emptying all this fluid from the gut a tape worm emerged! (second picture). The third picture shows the stapling instrument used to create the bypass.