If a dog vomits without eating, it may be due to a foreign body blocking the stomach. If the foreign body blocks the gastrointestinal junction of the dog, the food cannot enter the intestine for digestion and absorption, which will cause the dog to vomit and not eat.

Gastritis in dogs can cause vomiting, loss of appetite or exhaustion. It is recommended to consult a pet doctor. Dogs with slow gastrointestinal motility may also vomit and not eat. It is recommended to give some probiotics or yeast to help digestion.

If deworming is not carried out, the reproduction and migration of roundworms, tapeworms, etc. in the body can cause the dog to vomit, and even when the condition worsens, bloody stools and live worms will be excreted. It is recommended that dogs be dewormed regularly.