Because dogs are on all fours, their digestive tracts are arranged parallel to the ground, while in humans, because they are on two feet, their digestive tracts are perpendicular to the ground.

Because there is also the pull of gravity, people are less likely to vomit; and dogs lack this gravity , and the stomach and rectum are very close, it is easy to vomit before defecation, when constipation occurs, or if there is something wrong with the food.

Sometimes, vomiting is a self-healing process, because vomiting makes them more comfortable. But if it's sick, vomiting won't stop, and has other symptoms, you must see a doctor.

Some puppies secrete stomach acid due to hunger in the morning, and they will vomit some acidic water due to nausea.

At this time, the eating time must be adjusted immediately to avoid long-term corrosion of the stomach and esophagus, causing upper gastrointestinal problems.

Puppies are more susceptible to nausea or vomiting, which is often the reason they have a loss of appetite or are picky eaters.