Dog Vomiting Facts

All dogs vomit. And all dog owners know it! Dog vomiting begins in the well-developed “vomit center” of the dog, activated by the brain’s vomiting center. According to the AKC Veterinary Handbook, this causes dogs to heave more readily than any other animal. At the beginning when the dog feels the need to upchuck, he will become nervous and anxious while seeking reassurance from his owner. Cats will evacuate the area quickly or become too interested in the vomiting party. At the same time, the dog will begin to heavily salivate and swallow repeatedly. Again and again—until up it comes.

vomiting dog

Nobody likes a dog around who is vomiting, but it may be a sign of something serious.


The physical act of throwing up begins in the digestive system, with simultaneous contractions in the stomach muscles and abdominal wall.  With the abdominal pressure increasing, the lower esophagus will relax in order for the contents of the stomach to travel upwards through the esophagus and out the mouth.

One reason a dog vomits is when it eats or drinks too fast and too much. Other includes indigestible substances such as grass, being upset, or getting too excited. A dog who throws up because of a phobia—such as lightening, gunshots, or fireworks—will begin to drool while pawing and whining as their bodies tremble.

Vomiting with Diseases

A dog that has been diagnoses with an infectious disease or chronic diseases can also vomit. This includes kidney or liver failure, Cushing’s Disease, and diabetes mellitus. The type of vomiting that occurs determines what is going on—is it projectile, have worms in it, filled with foreign objects, blood, or fecal matter?

dog and blanket

I don't feel so good!

The different types of vomiting to watch for are persistent, sporadic, vomiting blood, fecal vomiting, projectile, and vomiting foreign objects.  Note whether or not is is repeated, especially focusing on whether it is sporadic or persistent. Does it occur after the dog eats and is it projectile?  Inspect it carefully for blood, fecal matter, worms or foreign matter. Call the vet and report to them what the findings are in addition to the dog’s temperature. Note the time of each occurrence for the vet to help determine how far apart they are.

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