Degenerative myelopathy in French bulldogs: Causes & care

Degenerative myelopathy is a progressive, incurable neurological disease that primarily affects the spinal cord of dogs, especially impacting their coordination and mobility. It leads to gradual weakening and paralysis of the hind limbs, typically appearing in mature dogs around five years and older.

This condition is inherited through a genetic mutation in the SOD1 gene. Dogs must inherit two copies of this defective gene to develop symptoms, making degenerative myelopathy a hereditary concern. Certain breeds—including the French bulldog—have a higher prevalence, prompting breed-specific health protocols.

If you own or plan to buy a French bulldog, understanding this condition is important for ensuring your pet’s wellbeing and making responsible decisions, especially around breeding.

What is degenerative myelopathy?

Degenerative myelopathy (DM) is a disease that progressively damages the nerve signals transmitted through the spinal cord’s white matter. This leads to muscle weakness, loss of coordination, and eventually paralysis, primarily of the back legs.

Although it is sometimes confused with arthritis due to similar initial symptoms such as instability when walking and difficulty rising, DM worsens steadily, causing loss of control over hind limbs, urinary and faecal incontinence, and later impacts the front limbs and respiratory muscles.

The progression varies between dogs, taking months or even years before quality of life significantly declines.

How is degenerative myelopathy inherited?

The disease is passed on by autosomal recessive inheritance with incomplete penetrance, meaning both parents must carry the faulty gene to risk producing affected offspring. Recent studies have shown certain breed populations carry a large proportion of carriers without symptoms but can pass on the gene mutation.

For French bulldogs, estimates suggest that around 20.7% of all dogs are carriers, with about 5.7% at risk of developing the disease. Responsible breeders test for this mutation to reduce incidence in litters.

How can you test your French bulldog for degenerative myelopathy?

The only definitive test for DM is a DNA test conducted by veterinary specialists. Your vet can collect a sample from your dog to check for the presence of the SOD1 gene mutation, categorising results as clear, carrier, or affected.

Testing is especially important for puppies and breeding dogs, as early identification can guide breeding decisions and help avoid passing the condition on.

Tips for breeding and buying healthy French bulldogs

If you are looking to buy a French bulldog puppy, always ask breeders about their health testing practices, specifically for degenerative myelopathy. Request proof that both parents have been tested and are clear to ensure the puppies have a very low risk of inheriting the condition.

Similarly, breeders should prioritise testing for DM and only breed from clear or carrier dogs responsibly, avoiding mating two carriers or any affected dogs. This commitment helps protect future generations and reduces heartache for owners.

Maintaining open communication with your vet and choosing reputable breeders who follow testing protocols are crucial steps in promoting responsible ownership and breed health.

Supporting a French bulldog affected by degenerative myelopathy

Though the disease is progressive and incurable, supportive care can help maintain a dog’s quality of life for as long as possible. This may include physical therapy, mobility aids such as harnesses or wheelchairs, and managing incontinence.

Prompt veterinary advice and regular assessments can help tailor a care plan that prioritises comfort and mobility.

Sadly, when the disease affects a dog’s lungs and front limbs, and quality of life significantly declines, humane euthanasia may be considered to prevent suffering.

Summary and next steps

Degenerative myelopathy is a hereditary progressive spinal condition affecting French bulldogs, causing hind limb weakness and eventually paralysis. It requires no only early recognition but also responsible breeding choices supported by genetic testing.

Understanding and monitoring this condition helps owners provide proper care and make informed decisions about breeding and puppy buying.

If you own or are considering a French bulldog, discuss DNA testing with your vet, and always opt for breeders committed to health screenings for degenerative myelopathy.

By doing so, you help improve the health and quality of life of these beloved dogs.