An intestinal obstruction happens when something prevents food, fluid, and gas from moving normally through the digestive tract. This may be caused by a swallowed object, severe narrowing, twisting, or another internal problem affecting the stomach or intestines.
Obstructions can become dangerous quickly. They can lead to repeated vomiting, dehydration, severe pain, damage to the bowel, loss of blood supply, perforation, and life-threatening illness if not treated in time.
One of the most common causes is a swallowed foreign object that becomes lodged in the stomach or intestines. Toys, bones, socks, underwear, string, corn cobs, stones, and other non-food items are common examples.
In some cases, obstruction may also be caused by a mass, severe inflammation, twisting of the bowel, or another abnormality affecting the digestive tract.
Pets with a possible intestinal obstruction may vomit repeatedly, refuse food, seem lethargic, drool, strain, become uncomfortable, or develop a tense or painful abdomen. Some pets try to eat or drink but cannot keep anything down. Others become progressively weaker and quieter over time.
Passing some stool does not rule an obstruction out, especially early on. Some pets continue to pass material that was already in the bowel while an obstruction is still developing.
Obstruction is more than an upset stomach. If the digestive tract is blocked, pressure builds up behind the obstruction and normal function breaks down. The bowel may become inflamed, stretched, bruised, or lose part of its blood supply. Vomiting and dehydration can worsen quickly, and the whole situation can become significantly more dangerous the longer it continues.
That is why repeated vomiting, worsening lethargy, refusal to eat, or abdominal pain should be taken seriously.
Assessment usually involves a physical examination, review of the history, and diagnostics such as digital x-rays, ultrasound, and blood testing. These help us determine whether a blockage is likely, how unwell the pet is, and whether urgent surgery may be needed.
Sometimes the diagnosis is clear early on. In other cases, it becomes clearer through imaging, repeat assessment, and how the symptoms are progressing.
If the stomach or intestines are obstructed, surgery may be needed to remove the cause of the blockage and assess the health of the affected tissue. This is especially important if a swallowed object is involved, if the bowel appears compromised, or if the pet is deteriorating despite supportive care.
Depending on the case, surgery may involve entering the stomach or intestine directly, or opening the abdomen to explore and identify the full extent of the problem.
Treatment depends on the cause, the location of the obstruction, how long it has been present, and how stable the pet is on arrival. Some cases require immediate stabilisation with fluids, pain relief, and monitoring before surgery proceeds.
If surgery is needed, this may involve foreign body removal, intestinal surgery, or exploratory laparotomy to identify and treat the problem safely.
Urgent veterinary assessment is important if your pet is vomiting repeatedly, unable to keep food or water down, not eating, showing abdominal pain, becoming lethargic, or you know or suspect they may have swallowed something dangerous.
These cases should not be watched at home for too long, particularly when symptoms are getting worse.
If your dog or cat is vomiting repeatedly, not eating, or showing signs that may suggest an intestinal obstruction, we can help assess how urgent the situation is and what diagnostics or treatment may be needed.
Learn what signs to watch for after a swallowed object and when urgent assessment is needed.
Learn how surgery is used to remove swallowed objects when obstruction or internal damage is suspected.
Learn what an exploratory laparotomy involves and how it helps diagnose and treat serious abdominal problems.
Use this guide when obstruction concern overlaps with vomiting, abdominal pain, weakness, toxin exposure or other urgent symptoms.
