Gastric dilatation-volvulus (GDV), commonly called bloat, is the most acutely life-threatening emergency in veterinary medicine. The stomach fills with gas (dilatation), then rotates on its axis (volvulus), cutting off blood supply to the stomach, spleen, and major blood vessels. Without emergency surgery, death occurs within 1-6 hours. There is no home treatment. There is no "wait and see." GDV is always a surgical emergency.
What Happens During GDV
- Dilatation: Stomach fills with gas, fluid, or food and expands rapidly
- Volvulus: Distended stomach rotates 180-360°, sealing both the entrance (cardia) and exit (pylorus)
- Vascular compromise: Rotation compresses the vena cava and portal vein, reducing blood return to the heart by up to 50%
- Tissue death: Stomach wall loses blood supply; necrosis begins within 1-2 hours
- Shock and death: Cardiovascular collapse, sepsis from bacterial translocation, cardiac arrhythmias
Recognize the Symptoms
- Distended/bloated abdomen — tight, drum-like when tapped
- Non-productive retching — attempts to vomit with nothing or only foam coming up. This is the hallmark sign.
- Restlessness/pacing — cannot get comfortable, looks at abdomen
- Rapid breathing/panting
- Excessive drooling
- Pale gums (poor circulation)
- Weakness/collapse — late sign indicating cardiovascular compromise
Risk Factors
| Factor | Risk Increase |
|---|---|
| Deep, narrow chest (Great Dane, Weimaraner, Standard Poodle, German Shepherd, Irish Setter) | Highest risk breeds — 20-25% lifetime incidence in Great Danes |
| First-degree relative with GDV | 63% higher risk |
| Eating one large meal daily | Higher than 2-3 smaller meals |
| Eating rapidly | Increased aerophagia |
| Stress/anxiety | Increased risk around stressful events |
| Age over 7 | Risk increases with age |
| Male sex | Slightly higher risk |
Emergency Treatment
- Stabilization: IV fluid resuscitation, shock treatment, stomach decompression (trocarization or orogastric tube)
- Radiographs: Confirm volvulus vs. simple dilatation
- Surgery: De-rotation of stomach, assessment of stomach/spleen viability, splenectomy if needed, gastropexy (permanent attachment of stomach to body wall to prevent recurrence)
- Post-operative monitoring: ICU care for 24-72 hours. Cardiac arrhythmias are common 24-48 hours post-surgery.
Survival Rates
- With surgery: 80-90% survival if treated early (before tissue necrosis)
- With surgery but stomach necrosis present: 50-60% survival
- Without surgery: nearly 100% fatal
- Cost of emergency GDV surgery: $3,000-$8,000+
Prevention: Prophylactic Gastropexy
For high-risk breeds, prophylactic gastropexy — surgically attaching the stomach to the body wall before GDV occurs — reduces risk by over 95%. It can be performed at the time of spay/neuter and adds 15-30 minutes to an already planned surgery. Cost: $500-$1,500 as an add-on procedure.
Recommended for: Great Danes, Weimaraners, Standard Poodles, German Shepherds, Irish Setters, Gordon Setters, and any large deep-chested breed, especially those with family history.
Other Prevention Strategies
- Feed 2-3 smaller meals daily (not one large meal)
- Use slow feeder bowls to prevent gulping
- Avoid vigorous exercise 1 hour before and after meals
- Reduce stress/anxiety (a known trigger)
- Keep emergency vet contact information readily accessible
Frequently Asked Questions
Can small dogs get bloat?
Rarely. GDV predominantly affects large and giant deep-chested breeds. Small dogs can experience gastric dilatation (gas) without volvulus, which is uncomfortable but rarely life-threatening.
My dog bloated once. Will it happen again?
Without gastropexy: recurrence rate is 75-80%. With gastropexy at the time of initial surgery: recurrence is less than 5%. Gastropexy is always recommended during GDV corrective surgery.
