Laryngeal Paralysis in Dogs
The larynx is the passage at the back of the throat, at the entrance to the windpipe. It contains two small cartilages that separate with each breath to allow air in, then close during swallowing to protect the airways. In laryngeal paralys...
What is it?
The larynx is the passage at the back of the throat, at the entrance to the windpipe. It contains two small cartilages that separate with each breath to allow air in, then close during swallowing to protect the airways.
In laryngeal paralysis, the nerves that control these cartilages do not work properly: they no longer open correctly. Air passes through an opening that is too narrow, which produces a harsh sound when breathing in and tires the dog.
The condition mainly affects large-breed dogs of middle age or older. It develops slowly over months, but a choking crisis can happen suddenly with exertion, excitement, stress or heat. In many older dogs, it is part of a more widespread nerve disorder that can also affect swallowing and the hind legs.
Key point
An older large dog with noisy breathing and a changed voice can suffer a choking crisis in heat or with exertion: blue gums, collapse, or breathing that does not settle are immediate emergencies.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
Barking that changes: harsher, weaker, hoarse or almost silent. This is often the first sign and is easily attributed to aging.
Noisy breathing, a harsh sound especially when the dog breathes in, louder when running, excited or when it is warm.
Excessive panting and poor tolerance of heat.
Tiring quickly on walks, needing to stop often.
Dry cough, gagging, particularly when drinking or eating.
Occasionally regurgitation or difficulty swallowing food and water.
Over time, weakness in the hind legs or uncoordinated gait in some dogs.
During a crisis: very difficult and noisy breathing, panic, blue-tinged gums or tongue, collapse.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
In most older dogs, no specific cause is found. The paralysis is often then part of a slow age-related nerve disease, geriatric polyneuropathy.
More rarely, it is caused by trauma or a neck tumour, or it is associated with an underactive thyroid: the vet will investigate these causes.
There are also rare inherited forms that appear in young dogs of certain breeds.
Middle-aged or older dog.
Large or very large breed, particularly the Labrador; Irish Setters and German Shepherds are also mentioned. Any large elderly dog, crossbreed included, can be affected.
Rare inherited forms in young dogs, described in particular in Bouvier des Flandres, Siberian Husky, Dalmatian, Rottweiler, Bulldog and Leonberger.
Heat, especially humid heat, exertion, excitement and stress: these are not causes, but they trigger crises.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
Your veterinarian listens to the breathing, examines the neck, and asks how long the voice and breathing have been changing. Diagnosis is based on direct examination of the larynx under light sedation: the veterinarian watches whether the cartilages open when the dog inhales. Chest X-rays look for aspiration pneumonia or other causes of breathing difficulty. A blood test may check for hypothyroidism; examination of the nerves and swallowing helps identify more widespread damage. During a crisis, the priority is to help the dog breathe: the dog is calmed, cooled, and given oxygen before any other examination.
Treatment
In mild cases, lifestyle measures may be enough for a time: avoid heat and exertion during hot hours, maintain a normal weight, replace the collar with a harness to avoid compressing the neck. When breathing difficulty becomes significant, the standard treatment is surgical: the surgeon fixes one of the cartilages in the open position to permanently widen the airway. After surgery, the risk of aspiration persists for life. Your veterinarian will give advice on feeding and monitoring. A choking crisis is an emergency treated at the clinic: sedation, cooling, oxygen, and sometimes placement of a breathing tube. Associated hypothyroidism is treated, even if this does not always reverse the paralysis.
Treatment depends on the cause and the animal's condition: it must be determined by a veterinarian. No self-medication.
Prevention
There is no known way to prevent laryngeal paralysis related to aging. However, episodes can be limited by taking walks during cool hours, avoiding exertion in hot weather, providing constant access to shade and water, using a harness rather than a collar, and maintaining a healthy weight. In Tunisia, the intense summer heat—especially when the air is humid—requires close monitoring. Report to your veterinarian any change in your dog's bark or any new breathing sounds in an older large dog, even if the dog seems well.
Possible complications
Choking crisis, which can be fatal without rapid care. Heat stroke: the dog can no longer cool itself by panting. Aspiration pneumonia, when food, water, or vomit passes into the airways; this risk exists before and after surgery. Progressive worsening of leg weakness and swallowing difficulty in the form linked to polyneuropathy.
When to see a veterinarian
The gums or tongue become blue, or the dog collapses: immediate emergency—keep the dog calm and cool during transport. The dog is breathing very hard, with effort, and not settling, especially after exertion or in hot weather: immediate emergency. The sound when inhaling increases noticeably and the dog seems panicked: seek emergency care. The dog is lethargic, has a fever, or coughs after eating or drinking: seek care without delay—aspiration is possible. The bark has become hoarse, weak, or nearly silent. The dog makes a hoarse sound when breathing, tires quickly on walks, or tolerates heat poorly.
Prognosis
The outlook depends on how severe the breathing difficulty is, whether aspiration has occurred, and whether other nerves are affected.
After surgery, most dogs breathe much better and return to a comfortable life; the risk of aspiration requires lifelong monitoring.
In the form linked to polyneuropathy, weakness in the legs may continue to progress slowly.
Frequently asked questions
Laryngeal Paralysis or Tracheal Collapse: How to Tell the Difference?
Tracheal collapse mainly affects small dogs. It causes a harsh, spasmodic cough that resembles a goose honk or a horn, and the voice does not change. Laryngeal paralysis primarily affects older large dogs: the noise is mainly heard during inspiration and barking becomes hoarse or weak. Only veterinary examination can determine which condition is present.
My dog has a flattened nose and breathes noisily: is it the same condition?
Not necessarily. In flat-faced breeds, such as Bulldogs or Pugs, brachycephalic syndrome is due to the shape of the head: discomfort and snoring exist from a young age. Laryngeal paralysis appears later, in a dog that was breathing normally, with a voice change. Both warrant a veterinary opinion.
Why do crises mostly occur in summer?
Dogs cool themselves by panting. When the larynx doesn't open properly, panting tires them out, air passes through less easily, and they become distressed, which worsens the discomfort. Heat, especially humid heat, can trigger a crisis and heatstroke. During hot weather, take them out during cool hours and let them rest.
Does surgery eliminate all risks?
It significantly improves breathing, but the larynx then provides less protection of the airways: the risk of aspiration and pneumonia persists. Your veterinarian will explain how to minimize it and what signs to watch for.
References
Content reviewed by the TunisieVet editorial team · Updated 11 October 2026
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