Updated September 25, 2026. Fact-checked against veterinary sources; review by a licensed veterinarian is in progress. See our editorial policy.
Quick answer: Gastroparesis means the stomach empties too slowly. Dogs with it often vomit undigested food hours after eating, seem nauseous, or look bloated. It’s usually caused by another problem, such as stomach inflammation, electrolyte imbalances, pancreatitis, hormone disorders, some medications, or recovery from bloat surgery. A blockage can cause the same signs and must be ruled out first. Treatment focuses on the cause, plus small, soft, low-fat meals and sometimes a prescription drug that helps the stomach move.
Signs
- Vomiting food that looks undigested many hours after a meal
- Nausea: drooling, lip licking, or turning away from food
- A full or bloated-looking belly after meals
- Burping or gassiness
- Weight loss or a picky appetite
Emergency warning signs
Go to an emergency vet right away if your dog has a swollen, tight belly and is retching without bringing anything up, is restless or drooling heavily, or collapses. These are signs of bloat (gastric dilatation-volvulus), which can be fatal within hours. Also go immediately if your dog may have swallowed a toy, bone, or other object.
Common causes
- Stomach inflammation, ulcers, or infection
- Low potassium or other electrolyte imbalances
- Pancreatitis or other abdominal inflammation
- Hormone disorders such as hypothyroidism or Addison’s disease
- Medications such as opioids and some anti-diarrhea or antispasmodic drugs
- After bloat surgery or other stomach surgery
- Nerve disorders, including rare conditions like dysautonomia
- Stress, pain, or recent anesthesia
How vets diagnose it
Your vet will first make sure there’s no blockage or tumor, usually with X-rays and ultrasound. Bloodwork checks electrolytes, organ function, and hormone levels. Sometimes a contrast study (barium) or endoscopy shows how fast the stomach empties and looks for ulcers or inflammation.
Treatment
- Treat the underlying cause, such as correcting electrolytes or treating pancreatitis or ulcers.
- Prokinetic medications: drugs such as metoclopramide, cisapride, or low-dose erythromycin help the stomach contract and empty. They must not be used if there’s any chance of a blockage, which is why diagnosis comes first.
- Anti-nausea medication such as maropitant.
- Fluids if your dog is dehydrated.
- Reviewing current medications that might slow the gut.
Feeding changes that help
- Small, frequent meals: 4–6 small meals a day instead of 1–2 large ones.
- Low-fat food: fat slows stomach emptying.
- Soft or moistened food: canned food or kibble soaked in water empties faster than dry kibble.
- Moderate fiber: high-fiber diets can slow emptying, so ask your vet what fits.
- A prescription gastrointestinal diet if your vet recommends one.
- Calm after meals: avoid hard exercise right after eating.
What to avoid
- Human anti-nausea or motion sickness drugs without your vet’s advice.
- Fatty treats and table scraps.
- Home “stomach settlers” like ginger supplements or peppermint oil given without vet guidance. Evidence in dogs is weak, and they don’t address the cause.
- Waiting out repeated vomiting. Dogs can quickly become dehydrated or develop electrolyte problems that make gastroparesis worse.
Frequently asked questions
Can gastroparesis in dogs go away?
Often, yes. When it’s caused by something treatable, like an electrolyte problem, inflammation, or a medication, stomach emptying usually improves once the cause is fixed.
Is gastroparesis the same as bloat?
No. Bloat is an emergency in which the stomach fills with gas and can twist. Gastroparesis is slow emptying, though it can occur after bloat.
What’s the best food for a dog with gastroparesis?
Usually a low-fat, easily digested, moist food fed in small portions. Your vet may recommend a specific gastrointestinal diet.
Sources
- Merck Veterinary Manual: Gastric motility disorders in small animals
- Merck Veterinary Manual: Gastric dilation and volvulus in small animals
- Whitehead K, et al. Gastrointestinal dysmotility disorders in critically ill dogs and cats. J Vet Emerg Crit Care. 2016
- American College of Veterinary Surgeons (ACVS): Gastric dilatation-volvulus
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.