Vomiting occurs commonly in dogs.
It seems to be caused most often by irritation of the stomach, called simple gastritis. The dog often first vomits food or another irritant material and later vomits clear or yellow fluid. They may or may not be interested in their normal food. It is time to seek veterinary help for vomiting if your dog vomits more than a few times, if the vomitus is ejected extremely forcefully, if there is blood in the vomitus or obvious abdominal pain, or if your dog seems particularly depressed or weak, has a fever, or retches unproductively, do not attempt to treat the condition at home. The vomitus usually looks like a frothy white or yellow fluid and is usually present in small amounts.