2. Bloat (Gastric Dilation) Bloat, or gastric dilatation, occurs when a dog’s stomach fills with gas, fluid, or food, causing it to expand. In cases of simple bloat, the stomach does not twist ...

Image by Wavebreakmedia via Depositphotos A bloated or distended stomach is a common symptom of a stomach ache in dogs. This can be caused by gas, fluid buildup, or an underlying medical condition.