What are the early signs of ileus?

Early signs often include decreased energy, reduced appetite, and vomiting or diarrhoea. If symptoms persist or your pet shows signs of dehydration or blood in the stool, contact your vet as soon as possible.

What tests are typically done at the clinic?

Common tests include blood and urine panels, abdominal X-rays, and ultrasound. Further imaging or tissue sampling may also be recommended to identify the underlying cause and assess severity.

What observations at home can help the vet with diagnosis?

Keep track of when symptoms started, daily food and water intake, vomiting frequency, and stool consistency and colour. Bringing videos or photos of vomiting episodes to the appointment can be very helpful for your vet.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Ileus (Intestinal Obstruction) in Pets: Symptoms, Diagnosis & Home Care [2025]

Name: Ileus (Intestinal Obstruction) in Pets: Symptoms, Diagnosis & Home Care [2025]
Creator: Pethealthmap Editorial Team
Published: 2026-07-04T16:35:37.892505+00:00

Ileus is a condition in which intestinal motility stops, often secondary to surgery, electrolyte imbalances, or systemic illness. It causes vomiting, loss of appetite, and abdominal distension. Treatment focuses on correcting the underlying cause and providing supportive care.

Take 1 minute to check the symptoms first

Last updated: 2026/01/17

Pethealthmap editorial team

Sources: WSAVA, AVMA, National Taiwan University Veterinary Hospital

When to See a Vet

01What symptoms signal a problem?

Ileus typically presents as changes in overall energy and digestive function. Watch for shifts in appetite, vomiting, and bowel habits, and monitor for signs of dehydration or rapid weight loss.

Lethargy and noticeably reduced activity level
Significantly reduced appetite or complete refusal to eat
Repeated vomiting or increasing frequency of vomiting
Diarrhea or changes in stool colour and consistency
Noticeable weight loss over a short period
Occasional coughing or difficulty swallowing — note and report these if present

Seek emergency care immediately if you notice the following symptoms:

⚠️ Continuous, uncontrollable severe vomiting
⚠️ Blood in stool or large amounts of dark-coloured faeces
⚠️ Obvious dehydration or inability to stand

02How can you assess the situation at home? Key home-monitoring points and emergency criteria

Keeping detailed records and short videos at home helps your vet quickly assess the situation and arrange any necessary tests.

Record when changes in energy and activity began and how severe they are
Log daily food intake and water consumption in millilitres or grams
Count vomiting episodes and photograph or video the vomit if possible
Note the frequency, consistency, colour, and presence of blood or mucus in stools
Weigh your pet at the same time each week and track changes
If symptoms worsen, seek a clinic that offers imaging (X-ray/ultrasound) promptly

03How does the vet make a diagnosis? Common diagnostic tests

At the clinic, your vet will use a physical examination combined with imaging and laboratory tests to evaluate intestinal function and identify any complications.

Urinalysis

to check for dehydration or abnormal kidney function

Abdominal X-ray

to assess intestinal gas distribution and signs of obstruction

Abdominal ultrasound

to evaluate intestinal wall thickness, motility, and free fluid

Biopsy or tissue sampling

for pathological assessment when needed

CT or MRI

for further evaluation of complex or difficult-to-diagnose cases

04How is the condition treated and managed after diagnosis? Medication, dietary adjustments, and care guide

Treatment depends on the underlying cause and severity, and often includes medication, nutritional support, and regular imaging or laboratory follow-up.

Prescribe medication tailored to the condition and schedule regular follow-up appointments
Adjust or switch to a prescription diet, introducing it gradually to reduce gastrointestinal stress
Monitor appetite, vomiting, and bowel habits at home and keep ongoing records
Schedule follow-up imaging or tests to confirm whether the condition is improving
Reassess prognosis regularly and adjust the treatment plan according to veterinary advice
For complex cases, referral to a facility with advanced imaging and internal medicine specialists is recommended

05What should you prepare before the appointment? Key information to help your vet identify the cause quickly

Prepare a log showing when symptoms started and how they changed day by day

Write down daily food intake, water consumption, and vomiting frequency (specific numbers)

Bring short videos of vomiting episodes or abnormal behaviour to show the vet

Bring a recent stool or urine sample if available

List all current medications, supplements, and relevant medical history

Call ahead to book an appointment and let the clinic know that X-ray or ultrasound may be needed

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.