Oesophagitis in dogs: symptoms, tests and treatment

Overview

The oesophagus carries swallowed food and fluid from the throat to the stomach. Inflamed lining may be sore, damaged or ulcerated. Mild inflammation may cause no visible signs, but severe changes can substantially impair eating. Injury may affect one local area or involve more widespread reflux-related irritation.

Reflux means stomach contents rising into the oesophagus. Oesophagitis means tissue inflammation caused by this or another factor, so the terms differ. Healthy dogs also sometimes have reflux without apparent harm. Severity and cause are investigated before planning long-term treatment.

Causes

Stomach contents can irritate the lining

Reflux is a common cause of oesophagitis. Anaesthesia, slow stomach emptying and a hiatal hernia can increase backflow. Acute or chronic vomiting can also be associated with oesophageal inflammation.

Injury depends partly on how effectively the oesophagus clears refluxed contents. Saliva and oesophageal contractions help with clearance. Bile acids and digestive enzymes can damage tissue as well as acid. Less acidic reflux is therefore not always harmless to the lining.

A foreign body, corrosive substance or local disease can injure tissue

A lodged foreign body can press on the lining and cause injury or tissue death. Damage is often more severe the longer the object remains. Local inflammation may persist after removal because the damaged lining still needs treatment.

Swallowed corrosive substances and certain medicines can cause chemical injury. Other possible causes include a tumour and disease caused by the parasite Spirocerca lupi. A feeding tube crossing the stomach–oesophagus junction can increase reflux and predispose to irritation.

Risk factors

Risk increases when stomach contents repeatedly reach the oesophagus or clearance slows. Narrowed upper airways and hiatal hernia in a flat-faced dog can promote reflux. French Bulldogs are one breed described in this context. This is anatomical predisposition rather than evidence that every dog of the breed has oesophagitis.

Small dogs, particularly terriers, were overrepresented in one oesophageal foreign body study from northern Europe. A foreign body is one possible starting point for inflammatory injury in these dogs. Previous anaesthesia, longstanding vomiting and oesophageal movement disorders also inform individual risk assessment.

Typical symptoms

Regurgitation is typical, although mild inflammation without signs is also possible. Painful swallowing may appear as slower eating or avoidance of food. You may notice:

• Food or fluid returns to the mouth without strong abdominal effort.
• Your dog drools or repeatedly swallows.
• Swallowing looks painful or difficult.
• Your dog extends the head and neck while eating.
• Appetite decreases and your dog seems more subdued.
• Persistent coughing or other airway signs occur.
• Prolonged eating and swallowing difficulties cause weight loss.

Vomiting, in contrast, generally involves abdominal contractions and active effort. Regurgitation may occur immediately after eating or drinking. New painful swallowing and regurgitation after anaesthesia may be delayed: a median onset of 7 days has been described.

Complications and consequences

Stricture formation often involves injury around the oesophageal circumference affecting the lining and underlying layer. Deeper lining damage can scar and narrow the internal passage. Food then cannot reach the stomach normally, and regurgitation may continue after treatment of the original inflammation. Food accumulating above the narrowing increases aspiration risk, meaning entry into the airways. Aspiration can lead to pneumonia.

In the northern European group of 69 foreign body patients, oesophagitis was found in 54/69 dogs, or 78%. Severity ranged from mild to severe. Four scarred stricture cases were confirmed or suspected. Pneumonia was identified in 8 patients. Of these foreign body patients, 68 were discharged despite inflammatory changes in several dogs. These outcomes concern foreign body injury rather than general prognosis for all oesophagitis.

A severely injured oesophagus can also perforate and cause chest cavity inflammation. Scar-related regurgitation may begin only 1–5 weeks after the original injury. As narrowing progresses, your dog may initially regurgitate soft food and later fluids too. Scarred strictures have a guarded outlook, although treatment benefits most patients. Long-term dietary modification may still be needed after other treatment ends. Persistent swallowing difficulty can impair nutrition. Injury depth and continuing irritation influence the support needed.

Diagnosis at the vet

History and endoscopy help identify injury

Your vet asks when signs began, links to meals, previous anaesthesia and medicines used. Possible swallowing of a foreign body or corrosive substance is investigated too. Distinguishing regurgitation from vomiting helps target the appropriate gastrointestinal region. Mouth, throat and breathing examination forms part of the overall swallowing assessment.

Endoscopy is the preferred examination for assessing oesophageal lining injury. It directly shows inflammation and any foreign body. A flexible scope passes through the mouth into the oesophagus and can also examine the stomach and first small intestinal section. Lining biopsies are taken for closer examination when needed.

Plain X-rays and swallowing studies answer different questions

Plain X-rays provide limited information about oesophagitis alone. However, they can help investigate a foreign body or airway complication. Videofluoroscopic swallowing assessment examines food passage and oesophageal contractions. Inflammation can itself impair oesophageal movement.

For suspected strictures, dynamic contrast imaging shows their number, length, location and severity. A very tight stricture may prevent endoscopic inspection of the oesophagus beyond it. External tumour compression or a congenital vascular ring can cause similar signs, so not every narrowing-related regurgitation results from scarring. Biopsy also helps distinguish tumour-related narrowing from other changes. Reflux investigation may use pH or combined pH-impedance measurement when needed. pH alone does not reliably detect weakly acidic reflux.

Treatment

The cause is removed and further irritation reduced

A foreign body is removed as quickly as possible to stop continuing pressure and irritation. Endoscopy can often both remove it and assess lining injury. Surgery may be needed if endoscopic removal fails or the wall is severely damaged. The cause of persistent vomiting or reflux is treated too.

An acid suppressant reduces stomach acidity and helps protect the irritated oesophagus. However, it does not itself prevent stomach contents returning. Medication supporting stomach emptying and lower sphincter function may therefore form part of treatment. Sucralfate can protect the lining. Pain relief is planned according to injury severity and overall condition. Your vet selects medication; do not start human painkillers or heartburn products yourself.

Nutrition is protected and complications treated

Oesophagitis generally involves soft, low-fat, low-fibre food offered as small, frequent meals. With severe injury, a tube can deliver food into the stomach so the oesophagus can rest. Food texture and delivery are tailored to swallowing ability and aspiration risk. Bacterial pneumonia may require antibiotics and other respiratory support.

An established scarred stricture is generally treated by balloon dilation. The procedure may need repeating if narrowing recurs. Dilation can itself irritate the oesophagus, so inflammation treatment continues alongside it. Some patients can receive an indwelling dilation tube intended to reduce repeated anaesthesia. This specialised tube may remain for around 6 weeks, with owners taught its care separately. Stenting or surgery may be considered for severe strictures unresponsive to dilation. However, stents carry many potential complications.

Prevention

Prevent injury by stopping your dog swallowing dangerous objects and corrosive substances. Sharp bone splinters, needles and other lodged objects can require urgent removal. Investigating persistent vomiting and reflux reduces ongoing oesophageal irritation.

Previous regurgitation, reflux or oesophageal injury is considered in the plan before anaesthesia. Acid-reducing medication may lower lining injury risk even though it does not stop every reflux episode. Agree medicine administration and preoperative instructions with your vet.

Important for dog owners

Record the timing of regurgitation, coughing and painful swallowing, including links to meals. When safe, take a video showing abdominal movement too. Report every medicine, previous anaesthesia and possible foreign body ingestion. Monitor weight, appetite, drinking and whether food and water stay down.

Follow the prescribed food texture and delivery method. Do not force a dog with swallowing difficulty to eat or drink. Do not induce vomiting at home without veterinary instructions. Arrange follow-up particularly if regurgitation persists or returns after treatment. New breathing difficulty, severe pain or inability to swallow water needs prompt assessment. At discharge, confirm what to do if eating is impossible or a feeding tube causes problems.

Frequently asked questions

Is oesophagitis the same as reflux?

Reflux means stomach contents rising into the oesophagus. It can cause inflammation, but oesophagitis has other causes, including a foreign body or corrosive substance. Persistent regurgitation is therefore not treated solely as a presumed acid problem: investigation establishes the cause and extent of injury.

Can a dog regurgitate without vomiting?

Regurgitation is usually passive, without the strong abdominal contractions typical of vomiting. It occurs in oesophageal diseases, including inflammation. Describing the event helps your vet distinguish regurgitation from coughing, swallowing difficulty and active vomiting and target investigations appropriately.

Does oesophagitis show on plain X-rays?

Oesophagitis alone shows poorly on plain X-rays. Endoscopy directly shows the lining and helps assess severity. A videofluoroscopic swallow study instead examines oesophageal function and any stricture's anatomy. Test selection depends on the suspected underlying problem.

Why do signs continue after foreign body removal?

Removal stops mechanical irritation, but the resulting lining injury still needs treatment. Severe damage can also scar and form a stricture. Persistent or recurrent regurgitation therefore needs follow-up, particularly if eating becomes difficult.

Does oesophagitis always need surgery?

Treatment often relies on medication, feeding and correction of the cause. A foreign body can often be removed endoscopically. A scarred stricture is generally balloon-dilated, but a severely injured oesophagus or narrowing unresponsive to other treatment may need surgical assessment.