If you’ve noticed your dog’s paw folding under while walking, dragging across the ground, or walking on the top of their foot instead of their paw pads, you’re likely witnessing a condition known as knuckling.

Knuckling is not a disease itself. Instead, it’s a symptom that something is affecting your dog’s nervous system, muscles, joints, or ability to properly control their limbs. While it can be alarming to see, early recognition and veterinary care can significantly improve your dog’s quality of life.

In this guide, we’ll explain what dog knuckling is, what causes it, how veterinarians diagnose it, and what treatment options may help—including when mobility aids can keep your dog active and comfortable.

What Is Knuckling in Dogs?

Knuckling occurs when a dog is unable to correctly place its paw on the ground. Instead of walking on the paw pads, the foot rolls under, causing the dog to bear weight on the top of the paw.

Many owners first notice:

• Dragging toes
• Scuffed or worn toenails
• Walking on the tops of the paws
• Frequent stumbling
• Difficulty standing
• Crossing the back legs while walking
• Loss of coordination
• Weakness in one or more limbs

Knuckling most commonly affects the rear legs but can also occur in the front legs depending on the underlying condition.

The image above is an exaggerated version of what knuckling looks like in a dog. Not every dog will walk fully on the top of its paw. Some dogs may scrape their toenails while walking, while others only drag their back feet when they’re tired. If you see unevenly worn toenails or scrapes on the top of your dog’s paw, it’s time to speak with your veterinarian.

Why Does Knuckling Happen?

Normal walking depends on constant communication between the brain, spinal cord, nerves, muscles, and joints.

When any part of that communication system is disrupted, your dog may lose awareness of where their foot is, a neurological function called proprioception.

Without proper proprioception, dogs cannot consistently correct the position of their paws, resulting in knuckling.

Common Causes of Knuckling in Dogs

1. Degenerative Myelopathy (DM)

Degenerative Myelopathy is one of the most common causes of gradual knuckling in older dogs.

Early signs include:

• Mild dragging of the toes
• Worn toenails
• Occasional knuckling
• Weakness in the hind legs
• Difficulty rising

As the disease progresses, coordination decreases and many dogs eventually require mobility assistance.

Learn more: Degenerative Myelopathy in Dogs

2. Intervertebral Disc Disease (IVDD)

IVDD occurs when a spinal disc compresses the spinal cord.

Symptoms often appear suddenly and may include:

• Knuckling
• Pain
• Reluctance to move
• Dragging the rear legs
• Paralysis in severe cases

Early veterinary treatment is critical with IVDD. The sooner your dog is properly diagnosed, the sooner treatment can begin, which often yields a better recovery.

3. Arthritis

Although arthritis itself doesn’t directly cause neurological knuckling, severe joint pain can alter a dog’s gait enough that paw placement becomes inconsistent.

Dogs with arthritis may also compensate for painful joints, leading to stumbling and occasional paw flipping.

4. Peripheral Nerve Injuries

Damage to the nerves controlling a limb can prevent a dog from recognizing paw position.

Common causes include:

• Trauma
• Surgery
• Bite wounds
• Stretch injuries

Recovery depends on the severity of nerve damage. For example, a dog with DM will never fully regain its proprioception. But a dog who suffered a traumatic injury may be able to regain proper paw placement through rehab therapy.

5. Fibrocartilaginous Embolism (FCE)

Often called a “spinal stroke,” FCE typically occurs suddenly during exercise. Dogs suffering from FCE may lose coordination within minutes or hours.

Luckily, many dogs improve with intensive rehabilitation and structured exercise. It’s incredibly important that a dog diagnosed with a Fibrocartilaginous Embolism work with a rehab specialist during their recovery.

6. Brain Disorders

Conditions affecting the brain, including tumors, inflammation, or strokes, can interfere with motor control and result in knuckling.

These cases often include additional neurological symptoms such as head tilt, seizures, or changes in behavior.

7. Wobbler Syndrome

Common in large breeds such as Great Danes and Dobermans, Wobbler Syndrome compresses the spinal cord in the neck.

Dogs often develop:

• Front leg weakness
• Rear leg weakness
• Knuckling
• An unsteady gait

Breeds More Commonly Affected

While any dog can develop knuckling, some breeds are more susceptible because of inherited orthopedic or neurological conditions.

Examples include:

• German Shepherds
• Dachshunds
• Corgis
• Labrador Retrievers
• Golden Retrievers
• Boxers
• Great Danes
• Doberman Pinschers
• French Bulldogs

How Veterinarians Diagnose Knuckling

Your veterinarian will begin with a neurological examination.

One of the most common tests is the paw placement test. During this test, the veterinarian gently flips your dog’s paw so the top touches the floor. A healthy dog immediately corrects the paw position. A delayed or absent correction suggests a neurological problem.

Additional diagnostics may include:

• X-rays
• MRI
• CT scan
• Blood work
• Neurological consultation
• Genetic testing (for Degenerative Myelopathy)

When Is Knuckling an Emergency?

Knuckling is almost always a sign that your dog is having mobility issues and needs to be seen by its vet. Seek veterinary care immediately if your dog:

• Suddenly cannot stand
• Cries out in pain
• Loses bladder or bowel control
• Becomes paralyzed
• Cannot use one or more legs
• Shows rapid worsening of symptoms

Prompt treatment may significantly improve the outcome for conditions such as IVDD or spinal injuries.

Knuckling Treatment Options

Treatment depends entirely on the underlying cause. There is no “one-size-fits-all” cure for dog knuckling. Every case will be unique and hinges entirely on your dog’s diagnosis.

Your veterinarian may recommend:

• Anti-inflammatory medications
• Pain management
• Physical rehabilitation
• Hydrotherapy
• Laser therapy
• Weight management
• Surgery
• Neurological care

Early intervention often leads to better long-term mobility.

Can Physical Therapy Help?

For many dogs, physical therapy can absolutely help and will be recommended for most dogs that are dragging their feet.

Rehabilitation may include:

• Balance exercises
• Cavaletti rails
• Underwater treadmill sessions
• Strength-building exercises
• Passive range-of-motion therapy
• Massage
• Proprioceptive training

Physical therapy can improve strength, coordination, and confidence while slowing muscle loss.

When Does a Dog Need a Wheelchair?

A wheelchair is not a sign that you’ve given up on recovery.

Instead, it can help dogs:

• Stay active
• Maintain muscle mass
• Continue daily walks
• Participate in rehabilitation
• Improve mental well-being
• Preserve independence

Many dogs use wheelchairs temporarily while recovering from surgery or injury, while others rely on them long-term for progressive neurological conditions.

The goal is always to improve quality of life, not replace treatment.

Helping Prevent Paw Injuries

Dogs that knuckle frequently often scrape the tops of their paws.

To help prevent injuries:

• Inspect the paws after every walk.
• Keep nails trimmed.
• Use protective dog boots when appropriate.
• Avoid rough surfaces during flare-ups.
• Monitor for cuts, sores, or bleeding.

Repeated abrasions can become painful and increase the risk of infection.

Frequently Asked Questions

Can knuckling go away on its own?

Sometimes, particularly if it’s caused by a temporary injury or mild inflammation. However, persistent or worsening knuckling should always be evaluated by a veterinarian.

Is knuckling painful?

The act of knuckling is not usually painful, but the condition causing it may be. Dogs with spinal disease, arthritis, or nerve injuries can experience significant discomfort.

Can older dogs develop knuckling?

Yes. Age-related neurological disorders, arthritis, and muscle weakness make senior dogs more susceptible.

Is knuckling always neurological?

Not always. Orthopedic disease, trauma, severe arthritis, and muscle injuries can also contribute, but neurological conditions are among the most common causes.

Final Thoughts

Seeing your dog knuckle can be frightening, but it doesn’t automatically mean the worst. In many cases, early diagnosis, rehabilitation, and supportive care can help dogs remain active and enjoy an excellent quality of life.

The most important step is recognizing that knuckling is a symptom—not a diagnosis. By working closely with your veterinarian and addressing the underlying cause, you can create a treatment plan tailored to your dog’s needs.

Whether that plan includes rehabilitation, medication, surgery, or mobility aids, many dogs continue to live happy, adventurous lives with the right support.

Remember: If you notice your dog’s paw consistently folding under or dragging while walking, schedule a veterinary examination as soon as possible. Early intervention often leads to the best outcomes for your dog’s long-term mobility and comfort.