Your dog's pupils are huge. Not just large enormous, fixed, not responding to the light in the room. You try moving your hand toward its eye. Nothing. And at the same time, it has been vomiting for days, refuses food, and cannot seem to urinate properly. The vet cannot find an infection. Nothing on the basic blood panel explains it. The dog's vision seems intact. It can walk. But something is profoundly wrong with almost every automatic function in its body.

This is the pattern that points toward one of the rarest and most serious conditions in veterinary neurology: dysautonomia.

This guide explains what dysautonomia is, how the autonomic nervous system works and why its failure produces such a strange and wide-ranging set of signs, what the diagnostic process looks like, and what owners can realistically expect when this diagnosis is made.

Canine dysautonomia is a disorder of the autonomic nervous system the part of the nervous system that controls involuntary functions like heart rate, digestion, urination, tear production, and pupil response. According to the Merck Veterinary Manual, it is a degenerative polyneuropathy involving neuronal degeneration within the autonomic, somatic, central, peripheral, and enteric nervous system. Signs include loss of the pupillary light reflex (with vision intact), drooping or abnormally protruding eyelids, difficulty urinating, loss of anal sphincter control, vomiting, diarrhoea, depression, and dramatic weight loss. There is no treatment, and the condition is ultimately fatal. Supportive care can extend and improve quality of life in some cases.

Key Takeaways

• Dysautonomia is a rare, degenerative disease of the autonomic nervous system in dogs. The cause is completely unknown.
• The autonomic nervous system controls every involuntary function in the body heartbeat, digestion, urination, tear production, pupil response. When it fails, all of these fail simultaneously.
• The most characteristic sign is dilated pupils that do not respond to bright light, in a dog whose vision is otherwise normal. This combination large pupils with intact sight is neurologically unusual and clinically significant.
• Other signs include vomiting, diarrhoea, depression, inability to urinate or defecate, loss of anal tone, dry eyes, and dramatic weight loss.
• Diagnosis is made by clinical signs, pharmacological pupil testing (pilocarpine drops), Schirmer tear test, and imaging.
• There is no treatment. Supportive care IV fluids, bladder management, eye lubrication can provide some comfort.
• The Merck Veterinary Manual classifies the prognosis as grave.
• Most cases have been reported in the United States (especially the Midwest) and Europe. Cases in India have not been formally documented, but the condition can occur wherever dogs are found.

What Is the Autonomic Nervous System?

To understand dysautonomia, you first need to understand what the autonomic nervous system does because it controls everything your dog's body does without thinking about it.

The nervous system has two broad divisions. The somatic (voluntary) nervous system controls conscious actions movement, posture, deliberate responses. The autonomic (involuntary) nervous system controls everything else. It has two major branches that work in opposition:

The sympathetic branch is the "fight or flight" system. When activated, it accelerates the heart, dilates the pupils to let in more light, suspends digestion, redirects blood to muscles, and raises blood pressure. It prepares the body for action.

The parasympathetic branch is the "rest and digest" system. It slows the heart, constricts the pupils, stimulates saliva and tear production, activates digestion, and manages bladder and bowel control.

These two branches work in balance around the clock. The heart beats because the autonomic system is continuously adjusting it. The pupils widen and narrow in response to light because the autonomic system controls the muscles of the iris. The bladder empties at the right moment because the autonomic system coordinates the sphincter and the detrusor muscle. Tear glands produce tears continuously because the parasympathetic system stimulates them.

When the autonomic nervous system degenerates when the neurons that carry all of these signals die every one of these functions fails at once. The heart loses fine rate control. The pupils cannot respond to light. The digestive tract stalls. The bladder cannot empty. The tear glands stop producing. All simultaneously, across the entire body.

That is dysautonomia.

What Is Dysautonomia in Dogs?

According to the Merck Veterinary Manual, canine dysautonomia is a disorder of the autonomic nervous system, which controls many reflexes and other neurologic functions that the animal does not consciously control. Crucially, the Merck Veterinary Manual notes that other components of the nervous system including central, peripheral, skeletal, and digestive nerves are also affected.

The Merck professional edition describes it more precisely: canine dysautonomia is a degenerative polyneuropathy characterised by neuronal degeneration within the autonomic, somatic, central, peripheral, or enteric nervous system, causing multisystemic effects. This means the condition does not target only the autonomic nervous system it damages neurons in multiple systems simultaneously.

The cause is completely unknown. Decades of research have not identified the triggering agent. Various hypotheses have been proposed toxin exposure, infectious agents, autoimmune mechanisms but none has been confirmed. The Merck Veterinary Manual is unambiguous: the etiology is unknown.

There is no cure. There is no treatment that slows or stops the neuronal degeneration. The prognosis is grave.

A Brief History: Key-Gaskell Syndrome

Canine dysautonomia was first described in England in 1983 according to the Merck Veterinary Manual's professional edition. The condition is sometimes called Key-Gaskell syndrome, named after the veterinarians who first characterised the feline version of the disease feline dysautonomia was first reported in 1982 and became the better-known form.

After its initial description, the condition became rare in Europe. The Merck Veterinary Manual's overview notes that the incidence of new cases in the UK has been decreasing since discovery in the 1980s. However, canine dysautonomia continued to be reported in the United States, particularly concentrated in the Midwest Missouri, Kansas, and surrounding states.

The Merck professional edition also notes that a case of canine dysautonomia has been described in a litter of Havanese puppies, pointing to sporadic occurrences even within litters of the same breed.

Dysautonomia of similar form also occurs in cats, horses, rabbits, and hares. The Merck Veterinary Manual states that canine dysautonomia has multisystemic effects similar, if not identical, to dysautonomia in horses, cats, rabbits, and hares. This cross-species pattern strongly suggests an environmental trigger something these species encounter in common but the causative agent has never been identified in any species.

Which Dogs Are Most Affected?

According to the Merck professional edition, canine dysautonomia typically appears to affect younger dogs, and dogs from rural environments are overrepresented.

This epidemiological profile younger dogs, rural settings is one of the few consistent clues about the condition's origin. It has led to speculation that an environmental exposure common in rural areas (a specific plant, a toxin in soil or water, a particular pathogen) may be involved. Despite decades of investigation, this exposure has not been identified.

There is no specific breed predisposition, though individual breed cases have been reported. Sex does not appear to be a significant risk factor. The condition appears to be sporadic rather than following any clear inheritance pattern.

Signs and Symptoms: A Body Losing Its Automatic Functions

Because the autonomic nervous system controls so many functions simultaneously, dysautonomia produces a clinical picture unlike almost any other disease it is a multi-system failure that appears to have no single organ as its source.

According to the Merck Veterinary Manual, signs often include loss of the pupillary light reflexes (with otherwise normal vision), drooping or protruding of the eyelid, abnormal position of the eyeball, painful or difficult urination, and loss of anal sphincter control. Secondary signs such as pneumonia and lethargic behaviour may develop. Weight loss may be dramatic.

The professional edition lists the commonly reported clinical signs:

• Vomiting
• Diarrhoea
• Depression
• Loss of appetite (inappetence)
• Decreased or absent anal tone
• Difficulty urinating (dysuria)

And the neurological findings specifically associated with autonomic dysfunction:

• Loss of pupillary light reflexes with intact vision (the pupils do not constrict in response to bright light, but the dog can see normally)
• Widely dilated pupils (mydriasis)
• Decreased corneal sensitivity (the cornea does not respond normally to touch)
• Protrusion of the third eyelid (nictitating membrane)

The combination of all these signs in the same dog, without an obvious infection, trauma, or toxic exposure, is what raises dysautonomia as a diagnosis.

The Eye Signs: Why Dilated Pupils With Intact Vision Matter

The eye findings in dysautonomia deserve special attention because they are diagnostically distinct and often the most striking early signs.

Normal pupil constriction in response to light is controlled by parasympathetic nerve fibres. When bright light enters the eye, parasympathetic signals cause the iris sphincter muscle to contract, narrowing the pupil. This is the pupillary light reflex (PLR). It is one of the most reliable indicators of autonomic nervous system function.

In dysautonomia, the degeneration of parasympathetic neurons means the iris sphincter muscle receives no signal. The pupil stays dilated regardless of how much light is present. The dog's vision which is handled by entirely different neural pathways (the optic nerve and visual cortex) is unaffected. So you get the specific combination: large, fixed pupils in a dog that can clearly see and track objects.

This combination is clinically significant because most causes of dilated pupils either also affect vision (as in some toxicities or retinal disease) or are unilateral (affecting only one eye, as in Horner syndrome or trauma). Fixed, bilateral mydriasis with intact vision strongly narrows the differential diagnosis toward conditions affecting autonomic nerve function specifically.

The protrusion of the third eyelid (nictitating membrane) in dysautonomia reflects loss of sympathetic tone to the muscles that normally retract it. The drooping or abnormal position of the eyelid similarly reflects disrupted autonomic control of the muscles around the eye.

Decreased corneal sensitivity reflects degeneration in sensory nerve branches that are part of the trigeminal nerve a component of the broader nervous system involvement that goes beyond the purely autonomic.

The absence or severe reduction of tear production (measurable by the Schirmer tear test) is a direct consequence of parasympathetic failure. Lacrimal glands are stimulated by parasympathetic signals; when those signals stop, tear production drops dramatically. In dysautonomia, Schirmer tear test values fall well below the normal reference range of 15 to 20 mm per minute. Values below 5 mm per minute indicate severe parasympathetic failure.

Gastrointestinal and Urinary Signs

The gastrointestinal tract is one of the most heavily autonomically regulated systems in the body. The enteric nervous system the gut's own neural network works in close coordination with the autonomic nervous system to move food through the oesophagus, stomach, and intestines.

In dysautonomia, this coordination breaks down. The oesophagus may dilate and lose its ability to propel food downward (megaesophagus). The stomach may fail to empty. Intestinal movement slows or stops (functional ileus). The result is the vomiting, regurgitation, and diarrhoea seen in affected dogs not from a stomach infection or food problem, but because the neurological control of the gut has failed.

Megaesophagus specifically creates a serious secondary complication. When the oesophagus is dilated and dysfunctional, food and liquid can accumulate there and be aspirated into the airways during swallowing attempts. This leads to aspiration pneumonia one of the most common immediate life-threatening complications of dysautonomia.

The bladder is also under autonomic control. Normal urination requires coordination between the detrusor muscle (which contracts to expel urine) and the urethral sphincter (which must relax at the same time). This coordination is managed by autonomic signals. When those signals fail, the bladder may become distended and difficult to empty, or the dog may lose voluntary control entirely. The Merck Veterinary Manual describes this as dysuria (painful or difficult urination) and loss of anal sphincter control.

Secondary Signs: Pneumonia, Weight Loss, and Lethargy

According to the Merck Veterinary Manual, secondary effects of autonomic dysfunction such as aspiration pneumonia and lethargy may develop. Weight loss may be dramatic.

Aspiration pneumonia is the most dangerous immediate complication. When a dog with megaesophagus attempts to eat or drink, food or liquid can enter the airways and lungs rather than pass safely down to the stomach. The aspirated material causes bacterial infection and inflammation in the lung tissue. Aspiration pneumonia is painful, compromises breathing, and can be rapidly fatal. It is one of the most common immediate causes of death or euthanasia in dogs with dysautonomia.

Dramatic weight loss is a consequence of multiple converging factors: inappetence (the dog does not want to eat), megaesophagus (food cannot reliably reach the stomach even if the dog eats), gut dysmotility (nutrients are not properly absorbed), and the metabolic demands of ongoing illness. The weight loss in severe cases is rapid and visible muscle wasting across the body becomes apparent within weeks.

Lethargy reflects the systemic impact of neurological degeneration, autonomic failure, secondary pneumonia, and the dog's overall deteriorating condition. A dog that was energetic and active may become quiet, unresponsive, and unwilling to engage.

How Vets Diagnose Dysautonomia in Dogs

According to the Merck professional edition, there is no definitive agreement on criteria for diagnosing canine dysautonomia, and laboratory findings are nonspecific. Antemortem (before-death) diagnosis is typically made through documented clinical signs of autonomic nervous system dysfunction and pharmacological testing.

Clinical signs are the starting point. A dog presenting with the combination of fixed dilated pupils and intact vision, third eyelid protrusion, dry eyes, megaesophagus on X-ray, vomiting, urinary difficulty, reduced anal tone, and depression in a young dog from a rural environment has a clinical picture strongly consistent with dysautonomia.

Pharmacological pupil testing is the best single confirmatory test. According to the Merck professional edition, pupil constriction within 60 minutes after application of dilute pilocarpine (0.05% to 0.1% ophthalmic solution) to the eye is supportive of dysautonomia. In a normal dog, the healthy parasympathetic innervation of the iris means a very low dose of pilocarpine has no effect the pathway is already functioning. In a dog with dysautonomia, however, the parasympathetic nerve fibres to the iris have degenerated, leaving the iris sphincter muscle supersensitive to any cholinergic stimulus. Even a very weak dose of pilocarpine causes the denervated muscle to constrict, producing visible pupil narrowing within 45 to 60 minutes. A normal dog given the same dose shows no change. This is the same principle as denervation hypersensitivity seen in other neural disorders.

The Schirmer tear test measures tear production. Values below 5 mm per minute (against a reference range of 15 to 20 mm per minute) reflect severe parasympathetic failure affecting the lacrimal glands. Partial or complete loss of tear production bilaterally, according to the Merck professional edition, supports the diagnosis.

Radiographic findings supporting dysautonomia include aspiration pneumonia, megaesophagus (the oesophagus appearing enlarged and food-filled on X-ray), functional ileus of the gastrointestinal tract (distended, non-moving intestinal loops), and urinary bladder distension. The Merck professional edition also notes that decreased cardiac contractility on echocardiogram may be found, reflecting autonomic failure in the heart's regulation.

Definitive diagnosis at the cellular level requires histological examination of autonomic ganglia looking at nerve tissue under the microscope to confirm neuronal degeneration. The Merck professional edition notes that neuronal chromatolysis (a pattern of cell body degeneration) is typically found in the autonomic ganglia, brainstem nuclei, and ventral horns of the spinal cord. In many cases, full confirmation is only possible post-mortem (after death), when nerve tissue from multiple sites can be examined.

The absence of specific laboratory findings is itself informative. A dog with this clinical picture and no evidence of infection, toxin exposure, or metabolic disease on standard bloodwork raises the index of suspicion for dysautonomia significantly.

What Happens Inside the Body: The Pathology

At the cellular level, dysautonomia involves a process called neuronal chromatolysis a pattern of degeneration where the cell body of neurons undergoes specific structural changes, the nucleus migrates to an eccentric position, and the cell eventually loses function.

This degeneration occurs most consistently in the autonomic ganglia the clusters of nerve cell bodies that relay signals between the central nervous system and the organs they regulate. When these ganglia degenerate, the nerve signals they carry are interrupted, producing the clinical signs of autonomic failure.

The degeneration is not limited to the autonomic ganglia, however. The Merck professional edition notes that it also occurs in brainstem nuclei and the ventral horns of the spinal cord. This explains why signs in dysautonomia are not purely autonomic there is also involvement of somatic motor pathways, which is why weakness and depression accompany the more specific autonomic signs.

The enteric nervous system (the gut's own independent neural network) is also involved, explaining the severe gastrointestinal dysfunction that is typically one of the earliest and most prominent signs.

This widespread, multi-system neuronal degeneration autonomic, somatic, central, and enteric is what makes dysautonomia so severe and so untreatable. There is no single nerve pathway to repair or bypass. The degeneration is diffuse and progressive.

Treatment and Prognosis: Honest Answers

The Merck Veterinary Manual is direct: there is no effective treatment for canine dysautonomia.

No medication, surgery, or intervention has been shown to stop, slow, or reverse the neuronal degeneration. The condition progresses regardless of treatment.

The Merck professional edition's key point summary states: "Canine dysautonomia is a sporadic, progressive disease of unknown etiology that results in progressive degeneration of the autonomic nervous system and has a grave prognosis."

A small number of dogs with milder disease have survived longer with intensive supportive care. Survival times vary. But for most dogs with significant clinical signs, particularly those who have lost deep pain perception or developed aspiration pneumonia, the outcome is death or euthanasia.

This is one of those conditions where honest communication between the veterinarian and the family is essential. The goal of any intervention is comfort and quality of life not cure. Many families choose humane euthanasia once the dog's quality of life deteriorates to a point where suffering outweighs any remaining function.

Supportive Care: What It Looks Like in Practice

According to the Merck professional edition, supportive care can include IV fluid therapy, regular bladder expression, artificial tear application, and administration of medications including metoclopramide (to support gut motility), ranitidine, and omeprazole (to manage gastric acid and stomach emptying).

IV fluid therapy addresses the dehydration and electrolyte imbalances caused by vomiting, diarrhoea, and the dog's inability to maintain adequate oral intake. Dogs with dysautonomia often cannot absorb sufficient fluids and nutrition through a failing gastrointestinal tract, requiring repeated or ongoing intravenous support.

Bladder expression manually pressing on the bladder through the abdominal wall to expel urine is needed when the dog cannot voluntarily urinate. A severely distended bladder causes pain and, over time, can lead to bladder wall damage and urinary tract infections. Some owners learn to manually express the bladder at home several times daily as part of nursing care.

Artificial tear drops are applied to compensate for the complete or severe loss of tear production. Dry corneas are painful and vulnerable to ulceration. Without lubrication, corneal damage can progress rapidly and add to the dog's suffering. Applying lubricating eye drops or gel multiple times daily is a critical component of supportive care.

Medications for gut motility such as metoclopramide aim to stimulate gastrointestinal movement, which may help reduce vomiting and improve the transit of food through the intestine. Ranitidine and omeprazole reduce gastric acid production, which is important when the stomach's normal acid-clearing mechanisms are compromised. These medications provide symptomatic relief but do not address the underlying neuronal degeneration.

Feeding management in dogs with megaesophagus involves feeding from an elevated position placing the food bowl at chest height or higher to use gravity to help food slide down to the stomach rather than pooling in the dilated oesophagus. Liquid or semi-liquid food may be tolerated better than dry kibble. Even with careful management, aspiration remains a risk.

For dogs receiving supportive care at home, maintaining the best possible nutritional status is important for quality of life during the remaining time. Supplements that support general neurological nutrition such as NEURO TABLET by Rectus Remedies (containing methylcobalamin, alpha lipoic acid, and neuroprotective antioxidants specifically formulated for nerve damage and neuromuscular weakness in dogs and cats) or NERVE ON TABLET by Vetina (containing methyl cobalamin B12, B1, B6, folic acid, and selenium for neural care in dogs) should only be considered under veterinary guidance and cannot alter the disease course. These products support general nervous system nutrition; they are not treatments for dysautonomia itself. General supportive nutritional supplementation with MULTI BOOST DOG LIQUID by Opuspet providing B-vitamins for nerve function, omega-3 for brain function, and vitamin E for cell protection may support overall wellbeing in dogs receiving palliative care when oral intake is possible. Discuss any supplementation with your veterinarian first, as the primary goals are comfort and quality of life.

Dysautonomia and India: What Dog Owners Should Know

Canine dysautonomia has been most consistently documented in the United States (particularly the Midwest) and in parts of Europe. Formal published case reports from India are not available in the veterinary literature as of 2026.

This does not mean the condition cannot occur in Indian dogs. It means it is either very rare here, or that the diagnostic workup required to confirm it including pharmacological testing and in some cases histological tissue analysis is not commonly applied. Many Indian dogs with a combination of gastrointestinal, urinary, and neurological signs may be managed symptomatically without reaching a formal diagnosis of dysautonomia.

What Indian dog owners should know practically:

The signs of dysautonomia particularly the combination of fixed dilated pupils in a dog that can see, along with vomiting and urinary difficulty warrant an urgent veterinary assessment. Do not wait for "home remedies" to improve a dog with dilated fixed pupils and systemic illness.

The condition should be considered when a dog presents with multi-system signs that do not fit an infectious disease, toxin ingestion, or metabolic disorder particularly in younger dogs without a clear explanation for their clinical picture.

Specialist neurological workup, including the pilocarpine test, Schirmer tear test, and imaging, may not be available in all Indian veterinary clinics. Dogs with this clinical profile may need referral to a specialist centre in a metro city such as Mumbai, Delhi, Bengaluru, Pune, or Hyderabad where advanced neurological diagnostics are more accessible.

The honest prognosis is grave. Families should be supported in understanding this clearly from the beginning, so they can make decisions about the extent and duration of supportive care that reflect both the dog's wellbeing and the family's situation.

Regarding overlapping conditions: several more common diseases in Indian dogs produce some signs that overlap with dysautonomia. Canine distemper can cause neurological signs including fixed pupils and gastrointestinal signs in unvaccinated dogs. Organophosphate toxicity (from pesticide exposure, common in rural India) can cause both autonomic dysfunction and gastrointestinal signs. Tick-borne diseases including ehrlichiosis can cause systemic multi-organ signs. These conditions must be ruled out before pursuing a dysautonomia diagnosis.

For managing the trembling and neurological signs that may accompany many of these conditions, our guide on how to prevent trembling in your dog covers when neurological tremors are an emergency versus manageable with monitoring. For dogs showing lethargy as a prominent sign alongside neurological dysfunction, our guide on how to prevent lethargy in your dog covers when lethargy indicates a serious systemic condition. For managing vomiting one of the most prominent signs of dysautonomia our guide on what to do when your dog is vomiting or has diarrhoea explains when vomiting needs emergency care and what the different urgency levels look like. For the broader set of signs that should prompt a vet visit, early illness signs and when to call the vet provides a comprehensive reference for Indian dog and cat owners.

FAQ

What is dysautonomia in dogs?
Dysautonomia is a rare, progressive, degenerative disease of the autonomic nervous system the part of the nervous system that controls involuntary functions like heartbeat, digestion, tear production, pupil response, and bladder control. According to the Merck Veterinary Manual, it involves neuronal degeneration within the autonomic, somatic, central, peripheral, and enteric nervous systems, causing multi-system failure. The cause is unknown, there is no treatment, and the prognosis is grave.

What are the signs of dysautonomia in dogs?
The most characteristic sign is fixed, widely dilated pupils that do not respond to bright light, in a dog whose vision is otherwise normal. Other signs include protrusion of the third eyelid, dry eyes, vomiting, diarrhoea, loss of appetite, depression, difficulty urinating, loss of anal sphincter control, and dramatic weight loss. Secondary complications include aspiration pneumonia and severe lethargy. The combination of multi-system failure neurological, gastrointestinal, and urinary without an obvious infection or toxin is what leads vets toward this diagnosis.

Is dysautonomia in dogs fatal?
Yes. The Merck Veterinary Manual classifies the prognosis as grave, describing it as a sporadic, progressive disease with progressive degeneration of the autonomic nervous system. There is no treatment that alters the disease course. A small number of dogs with milder presentations may survive longer with intensive supportive care, but the condition is ultimately fatal. Many families choose humane euthanasia when the dog's quality of life deteriorates significantly.

How is dysautonomia diagnosed in dogs?
Diagnosis is based on the characteristic clinical signs, pharmacological testing of the pupils (applying very dilute pilocarpine eye drops and observing whether the pupil constricts -- in a normal dog it would not; in a dog with dysautonomia, the denervated iris sphincter becomes hypersensitive and constricts), the Schirmer tear test (showing severely reduced tear production), and imaging findings (megaesophagus, bladder distension, aspiration pneumonia on X-ray). Definitive confirmation requires histological examination of autonomic nerve tissue, which is often only possible after death.

What is the difference between dysautonomia and distemper in dogs?
Both conditions can cause neurological signs in dogs. Distemper is a viral infection that typically occurs in unvaccinated dogs and often begins with respiratory signs (coughing, nasal discharge) before progressing to neurological involvement. It has a specific blood test and CSF analysis that can support diagnosis. Dysautonomia has no known infectious cause, typically does not begin with respiratory signs (unless aspiration pneumonia develops later), and is characterised by the specific autonomic failure pattern particularly the fixed dilated pupils with intact vision, dry eyes, and combined GI and urinary dysfunction. Both can cause lethargy, vomiting, and depression. Your vet will run tests to distinguish between them.

Has dysautonomia been reported in Indian dogs?
Formal published case reports of canine dysautonomia from India are not available in the veterinary literature as of 2026. However, the condition can theoretically occur anywhere dogs are found. The lack of Indian reports may reflect the rarity of the condition, the limited availability of specialist neurological diagnostic tools in many Indian clinics, or both. Indian dog owners who observe the characteristic combination of fixed dilated pupils with intact vision, alongside gastrointestinal and urinary signs, should seek veterinary attention promptly including referral to a specialist centre if available.

References

• Caroline N. Hahn, DVM, PhD, DECEIM, DECVN, Dysautonomia in Dogs, Merck Veterinary Manual (Dog Owners Section, Brain, Spinal Cord and Nerve Disorders of Dogs), Modified Sept 2024. https://www.merckvetmanual.com/dog-owners/brain-spinal-cord-and-nerve-disorders-of-dogs/dysautonomia-in-dogs
• Caroline N. Hahn, DVM, PhD, DECEIM, DECVN; reviewed by Joyce Carnevale, DVM, DABVP, Canine Dysautonomia, Merck Veterinary Manual (Professional Edition, Nervous System), Modified Apr 2024. https://www.merckvetmanual.com/nervous-system/dysautonomia/canine-dysautonomia
• Overview of Dysautonomia in Animals, Merck Veterinary Manual (Professional Edition, Nervous System). https://www.merckvetmanual.com/nervous-system/dysautonomia/overview-of-dysautonomia-in-animals