Collapsing trachea in dogs – symptoms and treatment

Overview

The trachea, or windpipe, is a flexible tube held open by C-shaped cartilage rings. The open side of each ring faces upwards.

Collapse may be limited to one area or affect several parts of the trachea. In severe disease, the main bronchi may also collapse.

The main bronchi are the large airways leading from the trachea to the lungs. This is a long-term structural change that usually progresses.

Current treatments cannot completely reverse the disease, but symptoms and quality of life can improve. Small and toy-breed dogs are most commonly affected.

Tracheal collapse is often found at the thoracic inlet, where the windpipe bends into the chest.

Causes

Weakened cartilage support and breathing phase

Weakening cartilage flattens, reducing the space for air inside the trachea. Stretching of the upper tracheal wall can increase flattening of the rings.

Several underlying factors are suspected, some of which are not yet fully understood. Inherited susceptibility may play a part.

Collapse in the neck usually makes breathing in difficult. Collapse within the chest may make breathing out difficult.

Narrowing can change during a single breath, so the airway does not remain the same size throughout. Reduced cartilage cell numbers and changes in supporting tissue composition have been found in affected dogs' tracheal cartilage.

Fat accumulating around the chest can restrict chest movement and impair breathing.

The cycle of coughing and irritation

Persistent coughing irritates the airway and can perpetuate further coughing. Ongoing coughing can cause chronic airway inflammation and predispose the dog to lung infections.

Pressure on the neck can trigger or worsen a coughing episode.

Mucosal irritation, inflammation and turbulent airflow caused by narrowing also contribute to coughing.

Risk factors

Yorkshire Terriers, Pomeranians, Poodles and Chihuahuas are commonly affected breeds. Collapse has also been reported in German Spitz (Klein) and Pomeranians.

Many affected dogs are middle-aged or older, but young dogs can also have symptoms. Excess weight increases the likelihood of symptoms.

Tobacco smoke and other inhaled irritants can worsen coughing. Heat, humidity, excitement and physical exertion can intensify symptoms.

Concurrent heart disease or another respiratory condition can increase the risk of breathing difficulties. The disease is less common in large and giant breeds.

The 110 dogs studied in South Korea between 2022 and 2024 ranged from two to 19 years old. In that study, small body size as well as obesity was associated with more severe collapse.

Typical symptoms

Severity can range from a chronic cough to severe respiratory distress.

• Your dog has a dry, loud, honking cough.

• Coughing starts when your dog is picked up.

• A tightening collar triggers coughing.

• A wheezing sound is heard during breathing.

• Your dog tolerates less exercise than usual.

• Excitement causes coughing or a bluish discolouration.

• Your dog may faint during a severe episode.

A dry cough does not usually bring up visible mucus.

Breathing effort may be greater during inhalation or exhalation, depending on where the narrowing is located.

Your dog may also cough while eating or drinking, because swallowing can irritate the airway and trigger a cough.

In the South Korean study, 108 of the 110 dogs had a chronic cough.

Complications and consequences

Disease and procedural risks

Progression of collapse into the bronchi can leave symptoms even after the trachea has been supported. Other concurrent problems may include chronic bronchitis, laryngeal paralysis and pneumonia.

Placement of external support rings may involve bleeding, airway injury or laryngeal paralysis. Laryngeal paralysis may require emergency airway surgery or a tracheostomy.

More complications have been described in dogs over six years old and those with laryngeal or bronchial disease.

Symptoms after stenting

A meta-analysis published in 2024 reviewed 15 studies from 2000–2020. Coughing occurred during the first six weeks after stent placement in about 99% of the dogs studied.

The pooled proportion with later coughing was 75%. Late coughing that affected quality of life occurred in 46%, rising to 52% after exclusion of a study that included only dogs surviving at least 100 days.

The pooled proportion with airway infection was 24%. Stent-associated granulation tissue, an inflammatory tissue growth, was found in about 20%.

Stent fracture occurred in 12%. Recurrent collapse occurred in 10%.

Stent migration occurred in 5%. Coughing or bacterial findings may have existed before stenting, so not all follow-up findings were caused by the new implant.

A stent that is too small can move within the trachea. A broken stent can allow previous respiratory symptoms to return.

Inflammatory tissue growing around the stent's edges can narrow the airway. Constant movement at the thoracic inlet increases the risk of stent fracture there.

Diagnosis at the vet

Initial examination and imaging

The vet assesses breathing and general condition before choosing further investigations. Gentle palpation of the neck may trigger coughing, but diagnosis may require additional tests.

Blood tests look for abnormalities affecting general health. Chest X-rays help assess heart size and other causes of coughing.

An ordinary X-ray may be normal because it records only one moment in the breathing cycle. Fluoroscopy, a moving X-ray examination, shows tracheal movement during breathing in and out.

It can also show how the airways behave during coughing. Moving images allow assessment of the location and severity of collapse.

Heart ultrasound may investigate concurrent heart disease when needed.

Endoscopy and grading the narrowing

During airway endoscopy, a thin camera is passed into the trachea and bronchi under general anaesthesia. The anaesthesia required limits assessment of airway changes specifically during coughing.

A wash sample may be collected during endoscopy to investigate infection. Cell examination and culture help assess the significance of bacterial infection.

A positive bacterial culture alone does not always mean an airway infection requiring antibiotics. Mild grade 1 collapse involves about 25% narrowing, while severe grade 4 may involve up to 100%.

In the Korean study, cough severity did not follow the degree or location of collapse seen on fluoroscopy. Investigations also establish whether disease extends into the bronchi, because this affects treatment outcomes.

Coughing triggered by neck palpation does not necessarily reflect the overall severity of signs caused by tracheal disease.

Treatment

Controlling symptoms and treating emergencies

The vet prescribes medicines according to symptoms, examination findings and other conditions. A cough suppressant may be used to reduce the urge to cough.

A corticosteroid can reduce airway inflammation. Some dogs also receive a bronchodilator to widen the bronchi.

Sedative or anti-anxiety medication may help break the cycle of coughing and agitation. Antibiotics are used when an infection requiring them has been diagnosed.

A dog in respiratory distress may need additional oxygen and other immediate stabilising treatment. Managing excess weight and concurrent heart disease forms part of overall care.

Medical management alone improves symptoms in up to 70% of dogs, particularly those with mild collapse. In the Korean study, treatment responses in 90 dogs were assessed 2–4 weeks after treatment began.

At that check, coughing had stopped in nine dogs. It had decreased but remained in 69 dogs.

Coughing was unchanged or worse in 12 dogs. The number of medicines prescribed was not associated with the degree of cough improvement in the same study.

Support rings or a stent?

A procedure is considered if medication is insufficient or the dog has respiratory distress. The neck portion of the trachea can be supported with externally placed rings or a spiral.

A stent is a support placed inside the trachea to keep the airway open. It can support both the neck and chest portions without an external surgical wound.

Stent placement is guided by fluoroscopy or endoscopy. Correct sizing and careful placement reduce the risk of migration.

Symptom improvement has been reported in about 75% of dogs after support rings. After stenting, 95% improved immediately and 90% showed clear improvement at follow-up.

However, rapid improvement in breathing does not mean that chronic coughing stops in every dog.

Recovery and ongoing medication

Most dogs go home about 1–2 days after the procedure. Exercise is usually restricted for about two weeks during healing.

Medication to reduce pain, swelling, coughing and agitation continues afterwards as needed. Medical treatment is often needed for life, even after a successful support procedure.

The tracheal lining grows over the stent over weeks or months.

Prevention

No reliable way to prevent tracheal collapse from developing is known. Weight loss may relieve symptoms in an overweight dog.

A harness reduces pressure on the neck compared with a collar. Remove tobacco smoke and other airway irritants from the dog's environment.

Even smoke residues or irritants on clothing and hair can trigger coughing. Avoiding hot, humid environments helps control symptoms.

Reduce exertion, stress and excitement according to your dog's symptoms.

Some breed clubs encourage German Spitz (Klein) and Pomeranian owners to report health information and changes through their health surveys.

Important for dog owners

Film coughing or a breathing episode if you can do so without delaying treatment. Record episode duration, circumstances and any relationship with walks, excitement, heat or a collar. Tell the practice about fainting and all current medication too.

An airway support does not remove the need for regular check-ups.

Ask for a written plan to monitor coughing, weight and breathing episodes, including when to seek emergency help. Before a procedure, establish its aims and which symptoms may remain. Arrange medicines and follow-up appointments according to the discharge instructions.

Frequently asked questions

Can a collapsing trachea be cured?

The structural disease cannot be completely reversed, but medication can relieve symptoms and improve quality of life. In more severe cases, a stent or external rings can support the trachea. Ongoing medical treatment is often still needed afterwards. Managing excess weight is also part of care.

Does a goose-honking cough always mean tracheal collapse?

A dry, honking cough is a typical sign. However, confirming the diagnosis requires veterinary examination and sometimes imaging or endoscopy. Chest X-rays can also investigate other causes of coughing and assess heart size.

Does tracheal collapse show on an ordinary X-ray?

Sometimes, but an ordinary X-ray may also show no clear finding. It records only one moment of breathing. Fluoroscopy shows the trachea moving during inhalation and exhalation, allowing more detailed assessment of narrowing and its location.

Why does my dog still cough after a stent?

The stent itself can irritate the airway and maintain coughing. Collapse may also affect the bronchi, which a tracheal support does not correct. Many dogs therefore need ongoing medication and regular veterinary checks even after the procedure.

When does a coughing dog need emergency care?

Seek emergency care immediately if breathing becomes difficult, the tongue or gums turn bluish, or your dog faints. Additional oxygen may be needed in severe respiratory distress. Mention any tracheal collapse diagnosis and current medication when calling so that the practice can prepare for arrival.