Intussusception in Sheep

Intussusception is a type of intestinal obstruction. One section of bowel slides into the next section, like a telescope folding in on itself. That traps feed, fluid, and gas, and it can also squeeze off blood flow to the affected intestine.

In sheep, this problem is uncommon but serious. It can affect lambs or adults, and signs may start as vague abdominal pain before progressing to depression, distention, dehydration, and reduced manure output. If the bowel becomes badly damaged, toxins and bacteria can leak into the abdomen and bloodstream.

For pet parents and flock managers, the key point is speed. A sheep with suspected intestinal obstruction should be examined promptly so your vet can decide whether conservative stabilization, on-farm monitoring, referral, or surgery makes the most sense for that animal and situation.

Intussusception happens when normal intestinal movement becomes disrupted and one segment of bowel is pulled into the next. In many sheep, a single exact trigger is never confirmed. Your vet may instead look for factors that changed gut motility or irritated the intestine shortly before signs began.

Possible contributors include enteritis, heavy parasite burdens, sudden digestive upset, intestinal irritation, or a physical problem that changes how the bowel moves. In ruminants more broadly, intestinal obstruction can also be associated with bezoars such as hairballs or plant material, and sheep are known to develop trichobezoars from wool ingestion in some situations.

Management factors matter too. Overcrowding, poor sanitation, abrupt feed changes, and inadequate parasite control can increase the risk of intestinal disease in sheep, even if they do not directly cause intussusception every time. Your vet may recommend looking beyond the obstruction itself to identify flock-level issues that could have set the stage.

Diagnosis starts with a hands-on exam and a careful history. Your vet will assess pain, hydration, abdominal distention, manure production, and whether the sheep is stable enough for treatment or transport. Because signs can overlap with other causes of colic, bloat, or intestinal blockage, diagnosis often focuses on ruling in an obstruction and ruling out other emergencies.

Bloodwork can help show dehydration, electrolyte changes, and whether the case is moving from metabolic alkalosis toward acidosis, which can happen as bowel damage and peritonitis develop. Ultrasound may help identify distended loops of intestine or other evidence of obstruction, although not every case is easy to confirm on imaging in the field.

In some sheep, the diagnosis is strongly suspected based on exam findings and progression of signs. In others, exploratory surgery is the only way to confirm the exact cause and location of the obstruction. That is one reason early veterinary involvement matters: the longer the bowel stays trapped, the worse the outlook can become.

Not every case can be prevented, because some sheep develop intussusception without a clear trigger. Still, lowering the risk of intestinal irritation and motility problems is worthwhile. Work with your vet on a flock health plan that includes parasite monitoring, strategic deworming, vaccination where appropriate, and prompt treatment of diarrhea or enteritis.

Good husbandry also matters. Avoid abrupt feed changes, provide consistent access to appropriate forage and clean water, and reduce overcrowding and sanitation problems that can increase digestive disease pressure. If sheep are chewing or ingesting wool, hair, or unusual materials, ask your vet to review nutrition, stocking density, skin irritation, and external parasite control.

The most practical prevention step is early recognition. A sheep with colic signs, bloat, or sharply reduced manure output should be checked quickly. Fast veterinary assessment may not prevent intussusception from happening, but it can improve the chance of timely treatment before the bowel becomes nonviable.