What Causes Bloat In Dogs?

What actually happens during bloat?

Bloat starts with gastric dilatation: the stomach fills with gas, fluid, or food and becomes distended. In many cases, the distended stomach then rotates on its axis (volvulus), twisting the entrance and exit shut. Once twisted, gas can't escape, blood supply to the stomach and spleen is cut off, and pressure on major blood vessels in the abdomen reduces blood flow back to the heart. According to the Cornell University College of Veterinary Medicine, GDV leads to tissue death, shock, organ failure, and death if not treated surgically within hours.

Which dogs are at risk?

Large and giant breeds with deep, narrow chests are at highest risk. Great Danes, German Shepherds, Standard Poodles, Weimaraners, Irish Setters, Gordon Setters, Saint Bernards, Doberman Pinschers, and Labrador Retrievers are among the most commonly affected breeds. Risk increases with age, lean body condition, a family history of bloat, eating one large meal per day, eating rapidly, and exercising vigorously after meals. Stress (boarding, travel, change in routine) has also been identified as a contributing factor. However, GDV can occur in any breed, including small dogs in rare cases.

What are the warning signs?

The signs of GDV come on suddenly and progress rapidly. Watch for a visibly distended or swollen abdomen that feels hard or tight, unsuccessful attempts to vomit (retching without producing anything), restlessness, pacing, excessive drooling, panting, and obvious signs of pain or discomfort. The dog may look at their belly, stand with a wide stance, or refuse to lie down. As the condition worsens, the dog may become weak, develop pale gums, and collapse. If you see any of these signs, especially in a high-risk breed, get to an emergency vet immediately. Minutes matter.

Can bloat be prevented?

While GDV can't be completely prevented, you can reduce the risk. Feed two or more smaller meals per day instead of one large one. Use a slow-feeder bowl if your dog eats quickly. Avoid vigorous exercise for at least an hour after meals. Minimize stress where possible. For high-risk breeds, ask your vet about prophylactic gastropexy, a surgical procedure (often done at the time of spaying or neutering) that attaches the stomach to the abdominal wall. Gastropexy doesn't prevent bloating, but it does prevent the life-threatening volvulus (twisting) component.