Is this disease hereditary?

Non-inflammatory myotonia often has a hereditary basis, but a definitive diagnosis requires a specialist veterinary examination and thorough history evaluation. If there is a family history of the condition, discuss further testing with your vet.

What home care can I provide to help my pet?

You can record your pet's breathing and eating patterns, adjust feeding posture, avoid over-exertion, and prepare video footage to share with your vet. Always follow specific home-care guidance provided by your veterinarian.

What tests will the vet arrange during the visit?

The vet will typically perform a physical examination, blood and urine tests, chest X-rays, and — when needed — advanced imaging or a specialist referral to evaluate respiratory and muscle function.

How much do the tests and treatment for this condition usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Non-Inflammatory Hereditary Myotonia in Dogs & Cats: Symptoms, Diagnosis & Supportive Care [2025]

Hereditary myotonia prevents muscles from relaxing normally, causing a stiff gait. There is no cure; management focuses on supportive care.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: ACVIM, WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Requires immediate veterinary care (emergency)

•Extremely rapid breathing with obvious open-mouth breathing
•Sudden loss of consciousness or brief fainting that cannot be roused
•Gums or lips turning purple or pale, suggesting oxygen deprivation

Schedule a clinic visit soon (within 24–72 hours)

•Breathing becomes slow or labored but is still sustained
•Unsteady walking, frequent falls, or an abnormal gait
•Difficulty eating or frequent choking and regurgitation

01What symptoms indicate something is wrong?

This condition commonly presents with abnormalities in breathing and muscle control that can affect your pet's activity level and ability to eat.

Rapid or labored breathing that worsens after exercise
Unsteady gait, frequent stumbling, or wobbly walking
Difficulty swallowing, choking, or regurgitation during meals
Possible elevated body temperature with signs of lethargy
Reduced activity level, easy fatigue, and reluctance to move

Seek emergency care immediately if you notice the following symptoms:

⚠️ Severely rapid breathing or open-mouth breathing that does not settle
⚠️ Sudden loss of consciousness or brief collapse that the pet cannot be roused from
⚠️ Purple or white gums or lips — a possible sign of oxygen deprivation

02How should you assess the situation at home? Key observations and criteria for emergency care

Keeping specific observations and notes at home helps your veterinarian quickly assess the condition and make an accurate diagnosis.

Record your pet's breathing rate and pattern at rest and during activity
Monitor mental alertness, activity level, and exercise tolerance over time
Note appetite changes and any choking or regurgitation during meals
Weigh your pet regularly and track short-term weight trends
Watch for any changes in urination or bowel habits
Use your phone to video your pet breathing or walking to share with the vet
If symptoms worsen, contact your veterinarian or arrange a visit promptly

03How will the vet make a diagnosis? Common diagnostic tests

At the clinic, the vet will start with a physical examination and combine imaging and laboratory tests to assess overall health and respiratory function.

Physical examination

including auscultation, breathing assessment, and muscle strength evaluation

Blood and biochemistry panel

to assess overall metabolism and infection markers

Urinalysis

to evaluate kidney function and metabolic abnormalities

X-rays

to examine the thorax, lungs, and musculoskeletal structures

CT or advanced imaging

to evaluate structural problems or complex lesions

04How should you treat and care for your pet after diagnosis? Medications, dietary changes & care guide

Treatment and follow-up must be tailored to each individual patient, with the focus on controlling symptoms, preventing complications, and long-term monitoring.

Medication or supportive therapy to manage respiratory and muscle-related symptoms
Adjusted feeding technique and diet to reduce the risk of choking and regurgitation
Home care including postural adjustments; avoid force-feeding or excessive activity
Regular recheck appointments to monitor blood work and any necessary imaging changes
Referral to a specialist or further diagnostic workup as the situation warrants
Collaborate with your vet to create an individualized long-term monitoring and care plan

05What should you prepare before the vet visit? Key information to help the vet identify the cause quickly

Write a timeline of when symptoms first appeared and how they have changed recently

List all current and recent medications and supplements your pet is taking

Bring a log of appetite, vomiting, and elimination patterns for the vet's reference

Bring any videos or recordings you have taken of your pet breathing or walking

If you have previous test results or imaging studies, bring those along as well

Consider calling ahead to book a clinic that can perform the required imaging or specialist examination

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.