Reasons for Dog Vomiting

Ingestion

• What your dog has eaten lately can help you determine why it is vomiting. Eating garbage, grass, plant leaves and table scraps can cause a dog to vomit. Dogs might also throw up if they eat a food they're allergic to, eat too quickly or experience a sudden change in their diet.

Parasites

• Internal parasites such as roundworm or hookworm can cause dog to vomit. A distended, round belly is one sign that your dog might have one of these worms. Long spaghetti-like roundworms might appear in the vomit.

Gastric Dilatation-volvulus

• Gastric dilatation-volvulus is a serious condition in which the stomachs of larger dogs flip over on itself. Circulation to the stomach will be entirely cut off. Dogs afflicted with this condition will try to vomit, but nothing will come up. Vomiting can also be caused by knotting of the small intestine.

Chronic Gastritis

• Chronic gastritis is an inflammation of the stomach. Dogs that often ingest dirt, gravel, feces, leaves, bark and wood are prone to this condition. Dogs with this condition, called pica and must be supervised to prevent them from ingesting materials that will make them vomit.

Tumors

• Older dogs that vomit frequently might have a stomach or small intestine tumor. A vet can help decide whether a stomach tumor can be removed surgically or whether your pet is so ill it will have to be euthanized.

Motion Sickness

• Dogs that do not frequently ride in cars might experience motion sickness. Administering Dramamine before travel, rolling down the windows and not feeding your dog before car travel can help prevent vomiting.