Dogs will vomit because they eat too much. This situation is not a big problem. Just be careful not to feed your dog too much when feeding your dog, because dogs are very resistant to hunger. Especially puppies, they don’t know if they are full, so if you keep feeding them, they will keep eating, and their intestines and stomach will be overburdened, resulting in indigestion and vomiting.
Sometimes the foreign objects spit out by the dog will be accompanied by moving insects, which means that there are insects in the dog's body. The dog will be very uncomfortable, and the foreign objects spit out will contain some bugs that are visible to the naked eye, and some bugs that are invisible to the naked eye. In this case, the dog will need to be dewormed.