Bloat (GDV) in Bernese: Signs, Prevention & Gastropexy

By the Riverside Berner Guide editorial team
Last updated November 9, 2026

Bernese Mountain Dog bloat is a true emergency: the stomach fills with gas and can twist on itself, cutting off its own blood supply. If you think your Berner is bloating right now, stop reading and go to an emergency vet. Don’t wait to see whether it passes.

The Bernese Mountain Dog Club of America (BMDCA) lists bloat among the breed’s health issues in its FAQ sheet. Its Health Issues sheet says treatment, most likely emergency surgery, can’t wait, because minutes rather than hours may save a life.

This guide covers the warning signs, why speed matters, the known risk factors and what a preventive gastropexy can and can’t do. It doesn’t diagnose or treat. Every medical decision here is one to make with your vet.

If you suspect bloat, go to an emergency vet now

Don’t try home remedies, and don’t wait for morning. The American College of Veterinary Surgeons (ACVS) says any of the warning signs below call for a vet visit right away. Washington State University’s veterinary teaching hospital says to treat it as an emergency and go to the nearest clinic or emergency hospital immediately.

The University of Florida’s small animal hospital puts it simply: time is of the essence. Delay costs lives. The ACVS reports a higher death rate in dogs whose signs went on for more than 6 hours before treatment.

Three things you can do today, before you ever need them:

• Find the nearest 24-hour emergency vet hospital and save its number and address in your phone.
• Learn the signs in the next section, and make sure everyone in your home knows them.
• Plan how you’d lift and move your Berner, since the ACVS lists weakness and collapse among the later signs.

When it happens, have someone call the hospital while you drive, if you can, so the team is ready when you arrive.

What bloat and GDV are

Vets use two terms. Gastric dilatation means the stomach has swollen with gas, food or fluid, and volvulus means the swollen stomach has twisted. Together they’re called gastric dilatation-volvulus, or GDV.

The ACVS explains why this is so dangerous. A swollen stomach can cut the blood flowing back to the heart and to the stomach lining, and it can press on the diaphragm so the lungs can’t fully expand. A twist can block the blood supply to the stomach and spleen, which can lead to damage in other organs, an irregular heartbeat and infection in the bloodstream.

No one knows exactly what sets it off. The BMDCA’s Health Issues sheet says studies have found so many factors before bloating that no single cause can be named.

Bloat symptoms in a dog: the warning signs

The University of Florida says the most common signs are retching with nothing coming up, restlessness and a swollen or uncomfortable belly.

Early signs

The ACVS and Washington State University list these early dog bloat signs:

• Retching or gagging without bringing anything up
• Drooling
• A belly that is swelling or looks bloated
• Restlessness, pacing or an anxious look
• Looking at the belly, or standing and stretching

Later signs

As GDV gets worse, the ACVS lists panting, weakness and collapse. Washington State adds trouble breathing, and Florida notes that severe cases can become unresponsive.

When it tends to happen

Bloat doesn’t keep office hours. In a central European survey of dog owners, signs began between 5 pm and midnight in 57% of the bloat cases. Most of those dogs had been lying down or sleeping after their meal, so don’t dismiss evening retching as an upset stomach.

Why GDV is an emergency

GDV gets worse by the hour. The ACVS says early stabilization and surgery give the best results because the risk of death rises as the disease gets more severe.

The numbers show why speed matters:

• About 15% of dogs treated for GDV die, according to the ACVS. The risk is higher when signs have lasted more than 6 hours, when the heartbeat is irregular before surgery, or when part of the stomach or the spleen has to be removed.
• Over 80% survive with prompt treatment, says the University of Florida.
• Without treatment, GDV is likely fatal, says Washington State University.

What happens at the emergency hospital

Knowing what to expect can help you say yes quickly. The ACVS describes the usual steps: blood tests, abdominal X-rays to confirm GDV, then fluids and oxygen to stabilize the dog. A tube is usually passed into the stomach to release gas and fluid.

Surgery then puts the stomach back in place. The surgeon checks the stomach and spleen for damage and finishes with a gastropexy, which attaches the stomach to the belly wall. The ACVS says dogs usually stay in the hospital for several days.

Emergency surgery is costly. Washington State says a preventive gastropexy costs less than emergency GDV treatment. Our guides to pet insurance for Bernese Mountain Dogs and the cost of owning a Bernese can help you plan for an emergency like this one.

Bernese Mountain Dog bloat: what the breed data show

The BMDCA takes bloat seriously. Its Diseases & Conditions page calls it life-threatening and says it needs immediate emergency treatment. The club’s FAQ sheet lists it with cancer, dysplasia and other breed health issues.

What we couldn’t find is a reliable bloat rate for Berners. Here’s what the studies we checked do and don’t say:

• UK and US studies: The authors of a 2019 case report in the Canadian Veterinary Journal say Berners haven’t been found to be a high-risk breed in UK and US studies. They add that in their own practice they often saw GDV in Berners, which is an observation, not a measured rate.
• A young puppy: That report describes GDV in a 5-month-old Berner, so youth alone doesn’t rule it out.
• A central European survey: In the Veterinární Medicína survey of 785 dogs, Berners were the second most common breed after German Shepherds. Their odds of GDV weren’t significantly different from German Shepherds’, though, and far more Berners took part than the national kennel register predicted (70 dogs against about 22 expected).

The survey’s authors warn that breed results may be skewed by which breed clubs and breeders spread the word. So treat these numbers with care. What’s clear is that the ACVS counts large and giant breeds among those at higher risk, and the BMDCA’s FAQ sheet describes the Berner as a large dog, with males generally 80 to 115 pounds.

Risk factors for bloat in dogs

The ACVS links these to a higher risk of GDV:

• A deep chest
• Being fed one large meal a day
• Older age
• Having relatives that have had GDV

It also lists suggested risk factors: eating from a raised bowl, having had the spleen removed, being a large or giant breed, and stress. A 2006 study it cites linked dry foods that list oils or animal fat among the first four ingredients to a higher risk.

Age matters more than many owners expect. Washington State University says dogs aged 9 to 12 are particularly at risk, with the chance rising about 20% each year. With the BMDCA giving the breed’s typical lifespan as 7 to 8 years, a long-lived Berner’s later years deserve extra watchfulness; see why Bernese lifespan is short.

Family history matters too. In the central European survey, dogs whose mother or father had GDV had about 3.4 times the odds of GDV. Intact males had higher odds and spayed females lower odds than intact females.

A dog that has bloated once is at higher risk of doing it again, says the BMDCA. Washington State says up to 80% of dogs get GDV again if they don’t have a gastropexy.

Everyday habits that may lower the risk

No routine can promise your dog won’t bloat; Washington State says GDV can’t be entirely prevented. These habits come from veterinary and breed-club sources. Talk any big diet change over with your vet first.

Meals

• Split the food. The BMDCA’s first-year guide says adult Berners are usually fed twice a day and warns that one large meal can potentially lead to bloat. The ACVS recommends two or three small meals instead of one large one.
• Slow down fast eaters, and skip raised bowls, as Washington State advises.
• Look at the label. Washington State suggests avoiding foods with oils or fats among the first ingredients, and favoring larger kibble pieces. In the central European survey, dogs whose meals held pieces bigger than 3 cm had lower odds of GDV.

Not every study agrees on meal frequency. The central European survey found no difference between dogs fed once or twice a day, and its authors suggest the total amount eaten may matter more. For help planning portions, see our Bernese feeding schedule and our guide to choosing food for a Bernese.

Exercise around meals

The BMDCA’s first-year guide suggests waiting at least an hour after a meal before exercise, with some advice saying two. It also suggests at least half an hour, and preferably an hour, of rest after exercise before feeding. Our guide to how much exercise an adult Bernese needs can help you plan walks around mealtimes.

Prophylactic gastropexy: what it does and doesn’t prevent

A gastropexy is surgery that tacks the stomach to the inside of the belly wall. Done as an emergency, it’s part of GDV surgery. Done ahead of time in a healthy dog, it’s called a preventive, or prophylactic, gastropexy.

What it does

It helps keep the stomach from twisting. The ACVS says many veterinary surgeons recommend it for at-risk breeds and for dogs with affected relatives. It can often be done during a spay or neuter, and less invasive options include laparoscopic-assisted methods.

The evidence for it is encouraging but small. In a Canadian study of 40 dogs followed for at least 2 years after an incisional gastropexy, none had GDV and two (5%) had a swollen stomach without a twist. Most dogs in the study had the surgery as part of GDV treatment, and the authors note that looking back at records may have missed some episodes.

What it doesn’t do

It doesn’t stop the stomach from swelling. The ACVS says gas can still build up, which is why feeding habits still matter, and Washington State says it isn’t a guaranteed prevention. A dog with a gastropexy that shows bloat signs still needs a vet right away.

Is it right for your Berner?

That’s a medical decision, so ask your vet. Bring your dog’s family history and ask whether doing it with a spay or neuter makes sense; our guide to when to spay or neuter a Bernese covers the timing questions.

Questions to ask your breeder and your vet

Because relatives matter, ask about bloat before you buy. The BMDCA’s Health Issues sheet urges buyers to ask which diseases exist in a puppy’s pedigree, and our list of questions to ask a Bernese breeder helps you do that.

Ask your vet:

• Which emergency hospital should we use after hours?
• Would a preventive gastropexy make sense for my dog, and when?
• How should I split my dog’s meals, and is my dog’s food a good fit?

If your dog ever bloats, please report it to Berner-Garde, the breed’s open health database. The BMDCA encourages every Berner owner to report health information there.

For the breed’s other big health concerns, from cancer to hip and elbow dysplasia, start with our guide to Bernese Mountain Dog health problems.