Bloat, properly called gastric dilatation-volvulus, happens when a dog's stomach fills with gas and then twists on itself. Once it twists, blood supply to the stomach and spleen gets cut off, and the dog goes into shock. It is fast, it is painful, and without emergency surgery it is very often fatal. There is no home treatment. The only thing that changes the outcome is getting to a vet immediately.
Who's actually at risk
Deep-chested, large breeds are disproportionately affected: Great Danes, German Shepherds, Standard Poodles, Weimaraners, Boxers and similar builds. Age matters too, risk climbs steadily after about five years old. Eating one large meal quickly, exercising heavily right after eating, and drinking a large volume of water fast are all recognised triggers, though bloat can occasionally happen without any obvious cause at all.
The signs that mean go now
- A visibly swollen, tight abdomen, especially behind the ribs
- Retching or trying to vomit with nothing coming up, often repeatedly
- Restlessness and pacing that doesn't settle, pain when the belly is touched
- Excessive drooling combined with an anxious, distressed look
- Weakness or collapse as shock sets in
Unproductive retching is the single most specific sign. A dog that keeps trying to vomit and can't is not something to monitor overnight, it's a reason to call the emergency vet on the way to the car.
What actually helps prevent it
Prevention isn't perfect, but a few things reliably lower the risk: feeding two or three smaller meals a day rather than one large one, using a slow-feeder bowl for dogs who gulp their food, avoiding hard exercise for an hour either side of eating, and for very high-risk large breeds, some vets recommend a preventative surgery called gastropexy, often done at the same time as neutering. It's worth a direct conversation with your own vet about whether that makes sense for your dog's breed and build.
Knowing your dog's normal
Bloat itself moves too fast for tracking to help in the moment, but knowing what your dog's normal eating pace, energy and belly shape actually look like is what lets you recognise "this is wrong" immediately instead of losing time second-guessing it. Halo keeps that baseline, plus your emergency vet's number, sitting in one place you can reach in seconds, not buried in a search history at the worst possible time.