Stomach bloat is something that every dog owner should be aware of. Knowing the early signs of bloating in dogs and the best ways to prevent it can mean the difference between life and death for your dog, and a full or empty bank account for you.
The fancy medical term for simple bloat is gastric dilatation. The fancy medical term for severe bloat with a twisted stomach is gastric dilatation-volvulus, or GDV.
DOGS THAT ARE HIGH RISK FOR BLOAT
Really any dog (or cat) can bloat, but it is far more likely in large breed, deep chested dogs. The Great Dane is far and away the No. 1 breed when it comes to bloat. Other high-risk breeds include the Greyhound, St. Bernard, Weimaraner, German Shepherd, Boxer, and setter breeds.
Any large dog (over 90 pounds) should be considered at risk, and this risk increases with age. Interestingly, the Bassett Hound, though smaller, also has a greater than normal propensity to bloat.
CAUSES OF BLOAT IN DOGS
Nobody knows exactly what causes bloat or why it happens in some dogs and not others, but there are certain things that have been linked to an increased risk of bloating including:
- History of bloat in a particular breed line (hints to a possible genetic predisposition)
- Dogs who eat too fast (ingest excess air with the meal)
- Using elevated feeding bowls (promotes ingestion of excess air with the meal)
- Feeding dry food with heavy fat/oil content
- Feeding a large meal vs. multiple smaller meals
- Exercising on a full stomach
- Drinking excessive amounts of water at one time
WHAT HAPPENS WHEN DOGS BLOAT
If excess gas starts to accumulate in the stomach for whatever reason, the distension quickly kinks off both the entrance and the exit of the stomach, so there is no way for the dog to dispel the gas that’s normally accomplished by burping or passing gas through the intestines.
Additionally, the pressure from the gas compromises the blood flow to the stomach wall, which starts suffering tissue injury right away. Then the big gas-filled stomach starts putting pressure on the great vessels that return blood to the heart (these travel underneath your dog’s backbone), which compromises cardiac output and general circulation, throwing your dog into shock.
At a certain point, the gas-filled larger part of the stomach (the “body” of the stomach) starts floating upward and flips over, resulting in a twisted stomach. This compounds all the issues mentioned above and accelerates the speed of progression of this disastrous medical condition. Without emergency surgical intervention, dogs with GDV die a painful death from cardiovascular shock and septic peritonitis from stomach devitalization and/or rupture, and it can happen within hours.
SIGNS OF BLOATING IN DOGS
Bloating dogs usually appear uncomfortable, if not distressed. It comes on suddenly. They are restless and may pace. Drooling and panting are common. Their bellies sometimes, but not always, look distended, and they may react painfully to pressure placed on their left flank. It’s common for dogs to display frequent, unproductive retching like they are trying to vomit but can’t.
WHAT TO DO
Get to a veterinary hospital as soon as any suspicion arises. Time is of the essence! If your dog receives treatment early enough, twisting of the stomach may be avoided and the full snowballing, life-threatening process described above may be averted.
TREATMENT FOR BLOAT
Your dog will be given antibiotics, medication for pain, and started on intravenous fluid support to combat shock. Abdominal x-rays will be taken to see if the stomach has twisted. Decompression of the stomach as quickly as possible is of the utmost importance. This is achieved either by passing a tube down the esophagus into the stomach to let the gas out, or by passing a large needle through the dog’s side into the stomach to release the gas.
Once the stomach has been decompressed and cardiovascular status is stabilized, the dog is taken to surgery. At surgery, the stomach, if twisted, is repositioned and then sutured or tacked to the body wall (gastropexy) to prevent reoccurrence of GDV. Even if the stomach didn’t twist this time, gastropexy is recommended, as the risk of recurrence of bloat with twisting in the future is high. Any devitalized or necrotic stomach tissue identified is removed. The spleen is sometimes collaterally damaged when the stomach rotates and must be removed or partially removed if damaged.
Post-operative care is intensive. Even if your dog makes it through surgery, he is not out of the woods for at least the next 24 to 72 hours, as post-operative complications are common. These include infection, sepsis, DIC (disseminated intravascular coagulation – a life-threatening diffuse clotting problem that can happen after a massive physiologic insult like this), and potentially fatal cardiac ventricular arrhythmias.
PREVENTION OF BLOAT
It’s pretty obvious this is a situation you’d be better off preventing if possible. The list of simple things to do to avoid bloat includes:
- Make sure there is no history of bloat in your potential puppy’s line.
- Avoid using elevated feeding bowls. These were once thought to help prevent bloat, but studies showed they actually increased its incidence.
- Add canned food to dry kibble meals; this has been shown to lessen risk of bloat.
- Feed at least twice a day, so meals are smaller.
- No exercise associated with meals. Do not feed after exercise until breathing is normal and relaxed. Promote rest for several hours after a meal.
- Consider a prophylactic gastropexy, especially for higher-risk dogs (see sidebar, above).
Even if prevention is not possible, the most important thing is to be aware of the signs of bloat and be ready to respond quickly.