Why Is My Dog Regurgitating? Understanding Acid Reflux

In this guide

Acid reflux in dogs is often confused with vomiting, but the two look and feel different. Reflux involves stomach acid or contents moving backward into the oesophagus, sometimes causing regurgitation, sometimes just discomfort that shows up as odd behaviour around mealtimes.

Regurgitation versus vomiting

Regurgitation is passive, undigested food or fluid comes back up with little effort or warning, often shortly after eating, and without the heaving or abdominal contractions seen in true vomiting. This distinction matters because it points vets toward oesophageal or reflux related causes rather than a stomach or intestinal problem.

Common causes

• A weak muscle at the junction between the stomach and oesophagus, allowing acid to move upward
• Hiatal hernia, where part of the stomach shifts through the diaphragm, more common in certain breeds such as Bulldogs and Shar Peis
• Anaesthesia, which can temporarily relax this muscle, sometimes causing reflux around the time of surgery
• Chronic vomiting from an unrelated condition, which can irritate the oesophagus and trigger secondary reflux

Signs to watch for

• Regurgitating undigested food, sometimes tube shaped from the oesophagus
• Excessive lip smacking, drooling, or swallowing
• Bad breath and, over time, dental erosion from stomach acid
• Reluctance to eat, or eating cautiously

Management

A low fat diet is one of the most consistently recommended changes, since dietary fat stimulates stomach acid production and slows how quickly the stomach empties, both of which worsen reflux. Vets typically pair this with smaller, more frequent meals, food served at room temperature rather than chilled, and calm rest for an hour or so after eating rather than vigorous play. Feeding from a slightly raised position can help some dogs with regurgitation by letting gravity assist food movement, though this is not universally recommended and works better for some dogs than others, so it is worth discussing with your vet rather than assuming it will help.

For dogs with confirmed esophagitis, vets often add sucralfate, a coating agent that protects the irritated esophageal lining while it heals, alongside acid reducing or motility medication where needed. Chronic or unexplained reflux warrants investigation, including imaging or endoscopy, to rule out a hiatal hernia or another structural cause.

Common Questions

Q: Can puppies get acid reflux? A: Yes, an immature oesophageal sphincter muscle in young puppies can cause reflux that often improves naturally as the puppy matures.

Q: Is acid reflux linked to anxiety in dogs? A: Not typically, though general stress can contribute to vomiting episodes in some dogs, the two are not considered directly connected conditions.

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