Dog Degenerative Myelopathy: Progressive Neurological Disease Management

Canine degenerative myelopathy is a progressive, incurable spinal cord disease causing paralysis, requiring careful welfare monitoring and mobility support as the disease advances.

Key Facts

Degenerative myelopathy (DM) is a progressive neurodegenerative disease analogous to ALS in humans, caused by mutations in the SOD1 gene
It typically begins in dogs over eight years old with weakness and wobbling in the hind limbs, progressing to complete paralysis
German Shepherds, Pembroke Welsh Corgis, Boxers, and Chesapeake Bay Retrievers are among the most commonly affected breeds
DNA testing can identify dogs carrying two copies of the mutant SOD1 gene — homozygous dogs are at high risk of developing DM
Physiotherapy and exercise have been shown to slow disease progression; dogs that exercise regularly maintain function longer
There is no cure — management focuses on maintaining quality of life and mobility as long as possible before humane euthanasia

Welfare Considerations

Degenerative myelopathy presents profound welfare challenges because affected dogs remain mentally alert and pain-free even as their physical function deteriorates. This creates a difficult quality-of-life assessment: dogs may be distressed by incontinence and immobility even without pain. Wheelchairs (dog carts) can dramatically extend the period of good quality of life by restoring mobility. Regular physiotherapy, hydrotherapy, and muscle-building exercise genuinely slow progression. Skin care to prevent pressure sores and urinary tract infection management are essential nursing requirements. End-of-life decisions must balance the dog's continued engagement with life against the progressive loss of dignity and function — regular welfare assessments with a vet are essential.

What You Can Do

If you have a breed predisposed to DM, discuss SOD1 genetic testing with your vet for breeding decisions
Begin physiotherapy and regular exercise at the first signs of hind limb weakness to maximise function duration
Explore dog wheelchairs and mobility aids early — dogs adapt most easily when introduced while still partially mobile
Work with a vet to establish a welfare monitoring framework with clear quality-of-life checkpoints
Support responsible breeding programmes that test and minimise transmission of the SOD1 mutation in affected breeds