Similar to what you may have experienced, a dog's tummy may regularly make noise. Some rumblings are expected as gas plays a normal part in the dog's gastrointestinal (GI) tract. Your dog's normal belly rumbles are typically caused by one of two things:
1. Air Consumption
While dogs don't drink carbonated beverages like humans do, they still consume their share of air. Have a quick eater? Generally speaking, the faster a dog eats, the more air they swallow in the process. This air has to go somewhere, and if it's not belched up, it makes its way along the gastrointestinal tract and announces its presence in the form of a rumbling tummy. This isn't a medical concern as the intestines are built for some gas to travel through them as part of the normal processing of food.
2. Hunger Pains
As a dog's stomach empties and prepares for its next meal, intestinal juices are often released in preparation. The release of these digestive juices and movement within the intestinal tract causes the tummy growling we associate with hunger. An empty belly often may make slightly louder noises than a full one, simply because there's no food in the intestines to absorb or block some of the noise.