DM in Rhodesian Ridgebacks is real, it’s more common than most owners realize, and caring for a 90-pound dog as the disease progresses requires a different set of tools and strategies than caring for a smaller breed.

Quick answer: Rhodesian Ridgebacks carry a notable rate of the SOD1 genetic mutation associated with degenerative myelopathy, placing them among the large breeds with meaningful DM risk. Symptoms typically begin between 8 and 12 years of age with hind-leg weakness, scuffing, and knuckling. Because Ridgebacks are tall and heavy, caregivers face specific challenges around lifting, wheelchair sizing, and pressure sore prevention that small-breed DM guides don't address. Genetic testing through OFA can confirm your dog's carrier status before symptoms appear.

Rhodesian Ridgebacks are built like athletes — deep-chested, long-legged, muscular. When DM starts stealing that rear-end strength, it can feel surreal. Many owners describe it the same way: their dog looked completely fine from the front, but the back end was quietly failing. Understanding the breed-specific picture — the genetics, the typical timeline, and the practical care challenges that come with a large-framed dog — gives you a real head start.

How Common Is DM in Rhodesian Ridgebacks?

Rhodesian Ridgebacks are one of the large breeds with a documented SOD1 mutation carrier rate, and the Orthopedic Foundation for Animals includes them in their DM testing program. Not every carrier develops DM — a dog with one copy of the mutation (called “at risk”) has a lower lifetime risk than a dog with two copies (called “affected/at risk”). But within the Ridgeback population, carrier rates are high enough that responsible breeders test before pairing dogs, and owners of untested dogs should be aware of the possibility.

The SOD1 mutation disrupts a protein that normally protects spinal cord neurons. Over time, without that protection, the nerve fibers in the spinal cord degrade — starting in the hind end and, in later stages, progressing forward. It’s a slow, progressive process with no cure.

What I’ve heard from Ridgeback owners in the DM community is consistent: many had never heard of DM when their dog’s back legs started going. The breed isn’t synonymous with neurological disease the way German Shepherds and Corgis are, so the diagnosis often comes as a shock. Knowing it’s a real risk for the breed is the first step toward earlier recognition.

What Does Early DM Look Like in a Ridgeback?

Early DM in Rhodesian Ridgebacks looks the same as in other breeds, but the signs can be easier to miss in a large, athletic dog who compensates well and powers through. Degenerative myelopathy in Rhodesian Ridgebacks typically begins with subtle hind-leg changes between ages 8 and 12, including scuffing on one or both back paws, occasional stumbling on uneven ground, and a slight wobble when turning.

The signs worth watching for:

  • Paw scuffing or knuckling: The dog drags the top of one or both back paws instead of lifting cleanly. You may notice worn nails on the hind feet, or scuff marks on smooth flooring.
  • Rear-end sway: A slight side-to-side wobble when walking, especially on turns or inclines.
  • Crossing of the hind legs: The back legs occasionally cross over each other mid-stride.
  • Weakness after exercise: The dog’s rear end tires noticeably faster than the front — they may sit down abruptly on a walk.
  • Difficulty rising: Getting up from a lying position takes more effort and more time than it used to.

Because Ridgebacks are stoic and strong, they often compensate with their front-end muscle for a surprisingly long time. By the time an owner notices something is off, the rear weakness may already be moderate. This is one reason the early signs of DM that owners often miss article is worth reading even before you’re certain something is wrong.

When to Stop Watching and Start Acting
  • Any consistent rear-leg weakness, stumbling, or paw scuffing in a Ridgeback over age 7 deserves a neurological exam — don’t wait for it to get obvious
  • DM can be confused with hip dysplasia, spinal tumor, or lumbosacral disease — a vet workup rules these out
  • Loss of deep pain sensation in the hind paws is a later-stage sign and means the disease has progressed significantly

The Large-Breed Care Challenge: What Changes at 90 Pounds

This is the part that most general DM guides gloss over, and it’s where Ridgeback owners need specific, honest information. Caring for a large dog with DM is physically and logistically harder than caring for a smaller dog with the same condition.

Lifting and Assisted Movement

A 35-pound Corgi can be scooped up and repositioned. A 90-pound Ridgeback cannot. As rear-leg function declines, you will need a proper rear-support harness from the beginning — not as a backup plan, but as your primary tool. A well-fitted harness like the Help ‘Em Up Harness is designed for exactly this: it gives you a handle to lift and guide the rear end without straining your back or the dog’s joints. Many Ridgeback caregivers find that two people are needed for repositioning once the dog is fully non-ambulatory.

Body mechanics matter for you, too. Back injuries in large-dog caregivers are common and can end your ability to care for your dog. Learning to lift with your legs, using equipment instead of brute force, and setting up the dog’s rest area at a height that reduces your bending are all things worth thinking about before you need them.

Pressure Sore Risk

More body weight means more pressure on bony points — hips, elbows, hocks, ribcage — during rest. Ridgebacks with DM who are spending more time lying down are at meaningful risk for pressure sores. The prevention toolkit is straightforward but has to be consistent:

  • Thick memory foam bedding: Not fiber fill, not a thin mat. Firm memory foam that doesn’t bottom out under the dog’s weight.
  • Position changes every 2–4 hours: If your dog can no longer reposition themselves, you need to do it for them.
  • Daily skin checks: Run your hands over every bony point every day. Redness that doesn’t fade when you remove pressure is your warning sign.

Wheelchair Sizing for a Tall Dog

Standard rear wheelchairs are sized by weight and body length, but Rhodesian Ridgebacks are also tall — they have long legs and a high hip height. A cart that fits a 90-pound dog of average height may sit too low for a Ridgeback’s anatomy. When you’re sizing for a rear cart, measure hip height specifically and tell the manufacturer. Most quality cart companies will custom-size for a breed like this, and getting that measurement right is the difference between a cart the dog uses willingly and one that causes sores or tip-overs.

The guide on wheelchair timing for DM dogs covers when to introduce a cart — for Ridgebacks, earlier is better, because a larger dog needs more time to build the front-end stamina for wheeling.

Sizing a Rear Cart for a Large Ridgeback
  • Measure: body length (collar to base of tail), chest girth, hip width, and hip height from floor
  • Hip height is the measurement most often missed for tall breeds — confirm it with the manufacturer
  • Start with 15-minute sessions and build gradually; large dogs fatigue faster in a new cart
  • Check all contact points (belly strap, leg rings) daily for rubbing or redness

What Ridgeback Owners Report About the Progression

From what I’ve heard in the DM caregiver community, Ridgeback owners describe a progression that roughly follows the general DM timeline — but with some notable patterns:

The early phase (scuffing, mild wobble) can last anywhere from several months to well over a year. Many owners report that their dogs seemed to plateau at mild weakness for a long time, then progressed more quickly. This matches what’s known about DM generally: progression is individual and unpredictable. Keeping a symptom and progression log from the beginning helps you see the trajectory clearly rather than relying on memory.

Ridgeback owners also commonly report that their dogs stayed mentally sharp and emotionally engaged well into advanced physical decline — this breed is known for its alertness and connection to its people. That emotional engagement is both a reason to keep going and a reminder that quality of life includes mental stimulation, not just physical function.

Practical Wins Ridgeback Owners Report
  • Rear harness introduced early makes transitions between stages much smoother
  • Traction runners throughout the house extend independent mobility significantly
  • Splitting walks into two short outings instead of one long one reduces rear-end fatigue
  • Starting physical therapy with a rehab vet while the dog is still mobile preserves strength longer

Should You Test Your Ridgeback for SOD1?

If your Ridgeback is young and healthy, testing is straightforward and gives you useful information. A dog with two copies of the mutation (homozygous) has a higher lifetime risk than a dog with one copy (heterozygous), and a dog with no copies has the lowest risk. The SOD1 genetic test won’t tell you whether or when your dog will develop DM, but it shapes what you watch for and when.

If your dog is already showing rear-end changes, testing can still be part of the diagnostic picture — though the diagnosis of DM ultimately comes from ruling out other causes, not from the genetic test alone. The process of getting a DM diagnosis explains what that workup typically looks like.

If you’re reading this because your Ridgeback just started stumbling and you’re not sure what you’re looking at yet — that’s okay. The uncertainty of early DM is genuinely hard, and the physical demands that come later are real. But Ridgeback owners who start preparing early, get the right equipment in place, and connect with a rehab vet consistently say the same thing: they were glad they didn’t wait. Your dog’s rear end may be failing, but they’re still fully themselves — and that matters.

Frequently Asked Questions

Are Rhodesian Ridgebacks at high risk for degenerative myelopathy?

Rhodesian Ridgebacks have a notable rate of SOD1 mutation carriers within the breed, meaning a meaningful portion of the population is genetically at risk. Not every at-risk dog will develop DM, but the breed is considered one of the affected large-breed populations. Genetic testing through OFA can tell you whether your Ridgeback carries zero, one, or two copies of the SOD1 mutation.

At what age do Rhodesian Ridgebacks typically develop DM symptoms?

DM in Rhodesian Ridgebacks typically appears between 8 and 12 years of age, following the pattern seen in most large breeds affected by SOD1-associated DM. Some dogs show early signs — scuffing, knuckling, occasional stumbling — as young as 7. The earlier you spot those signs and get a neurological workup, the more lead time you have to prepare.

What makes caring for a large DM dog different from a small one?

The core challenge is weight. A 90-pound Ridgeback cannot be lifted the way a Corgi can, so assistive equipment — a well-fitted rear harness, a wide-frame rear wheelchair, non-slip surfaces throughout the house — becomes essential much sooner in the process. Pressure sore risk is also higher because more body weight presses down on bony points during rest.

When should I start thinking about a wheelchair for my Ridgeback with DM?

Most DM caregivers and rehab specialists recommend introducing a wheelchair when the dog begins to trip, stumble, or tire noticeably on walks — well before the dog loses the ability to bear weight. Starting early means the dog learns to use the cart while they still have strength and coordination. For a large-breed dog like a Ridgeback, fitting for a wide-frame rear cart should happen as soon as consistent rear-leg weakness is confirmed.

This guide is based on real experience and should be used alongside professional veterinary care. Always consult your veterinarian before starting any new treatment or making changes to your dog’s care plan.