Regurgitation, vomiting or dysphagia: how to tell them apart
3-year-old German Shepherd that for two weeks has been bringing up food without retching or abdominal contractions, sometimes minutes and sometimes hours after eating. The material is undigested, tube-shaped food with mucus. There has been no nausea, prior drooling or difficulty prehending or swallowing.
How do you classify the sign and which structure should you investigate first?
chevron_right Show answer and explanation
A. Vomiting; investigate stomach and intestine with abdominal ultrasound
Vomiting is an active process preceded by nausea (drooling, lip-licking, restlessness) and with abdominal contractions. None of these is present here.
B. Oropharyngeal dysphagia; examine the mouth and pharynx under sedation
Dysphagia is difficulty prehending, chewing or swallowing: the animal makes repeated attempts, coughs when swallowing or drops food. This dog swallows without problems.
C. Regurgitation; investigate the oesophagus starting with thoracic radiographs
Correct. Passive expulsion, without nausea or abdominal effort, of undigested food: this is regurgitation and localises the problem to the oesophagus. Thoracic radiographs look for megaoesophagus, foreign body, mass and aspiration pneumonia.
D. It cannot be distinguished from the history; the only way is to measure the pH of the expelled material
The history is the main tool. pH is of little help (vomitus may not be acidic and regurgitated material may be mixed with reflux) and does not replace the history.
lightbulb Key takeaway
Always ask about nausea and abdominal contractions: they separate vomiting (stomach/intestine or systemic causes) from regurgitation (oesophagus). Material coming up hours later or containing bile does not always rule out regurgitation. An owner's video helps greatly.
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Updated: October 31, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.