Diagnosis

• A horse with intermittent colic can undergo treatment, but if discomfort persists with little or no feces passing, further diagnostic evaluation is necessary. Blockage is usually caused by a fluid-filled mass, called a perirectal abscess, and fecal impaction, called dyschezia. Dyschezia, combined with a ruptured mass draining into the rectum and the horse straining to defecate, causes rectal inflammation.
  
  

Treatment

• After lubricating the tract with mineral oil (about one gallon) through a tube, as laxative and fecal matter moves through the tract, use a small needle to puncture the perirectal abscess to drain into the rectum, according to Cooperative Extension Service. Treat the abscess with warm, soapy water enemas and analgesics (pain-relievers), according to the National Center for Biotechnology Information. Check on your horse every two hours after treatment.
  
  

Diet

• Practical horse management, which includes fresh water daily and a daily scheduled diet that includes fresh hay and a mixture of sweet feed and grain, can help you avoid perirectal abscess and dyschezia in a horse.