Dog Syringomyelia and Chiari Malformation

Syringomyelia and Chiari-like malformation in Cavalier King Charles Spaniels cause severe chronic pain that represents one of the most serious breed-related welfare crises.

Key Facts

The Cavalier skull is too small for its brain, causing the cerebellum to herniate into the spinal canal
Syringomyelia occurs when CSF flow is obstructed, forming fluid-filled cavities in the spinal cord
Up to 70% of Cavaliers have skull abnormalities and up to 50% develop syringomyelia
Pain causes phantom scratching, sensitivity to touch, and crying without apparent cause
Affected dogs may scratch their neck incessantly without making contact with the skin
Gabapentin and NSAIDs reduce pain but cannot cure the underlying structural problem
Surgery to decompress the back of the skull can provide relief in some cases
The Cavalier Health Organization runs breeding programs to reduce affected offspring

Welfare Considerations

Syringomyelia causes chronic, unrelenting neurological pain that severely impairs quality of life. The phantom scratching behavior - dogs desperately scratching at a pain location they cannot reach - is one of the most distressing welfare sights in companion animal medicine. Many Cavaliers live with inadequately treated pain for years. The condition is entirely the result of human selection for a skull shape incompatible with normal neurological function - a direct consequence of irresponsible breeding standards.

What You Can Do

Support the Cavalier Health Organization breeding screening programs
Never purchase Cavalier puppies without verification of parent MRI health clearances
Advocate for breed standards that prioritize health over extreme appearance
Ask your vet about appropriate pain management for affected Cavaliers
Support legislation requiring health screening before breeding brachycephalic dogs