Dog Back Leg Joint Problems: Joints or Nerves, and What Helps

Osteoarthritis is the most common chronic disease in dogs, and by most estimates 25% of all dogs are affected, regardless of age.¹ If your dog's back end is wobbly, slow to rise, or struggling on stairs, the first job is not buying anything. It is finding out whether the problem is in the joints, in the spine, or both, because the answer changes what helps.

What usually causes dog back leg joint problems

Degenerative joint disease, also called arthritis or osteoarthritis, is the gradual, irreversible wearing away of the cartilage inside one or more joints.¹ Overweight dogs are more likely to develop it, both from the low-grade inflammation that comes with obesity and from the extra stress that weight puts on joints.¹

Hip dysplasia is abnormal development of the hip joint, mostly in large dogs, and it leads to a loose joint and then osteoarthritis.² It is seen mainly in bigger breeds such as German shepherds, Saint Bernards, Labrador retrievers, golden retrievers, Old English sheepdogs and bulldogs.³ See our guides to hip dysplasia in dogs and hip problems in German shepherds.

In the knee, the most common injury is a tear or rupture of the cranial cruciate ligament, the dog equivalent of the human ACL and the main stabiliser of the knee.⁴ It usually degenerates slowly rather than snapping out of nowhere, and a dog that ruptures one is at increased risk of doing the same on the other side.⁴ A wobbly kneecap, known as a luxating patella, can also contribute to cruciate damage.⁴

Spinal and nerve conditions can look identical from the outside. Degenerative myelopathy, for example, is a spinal cord disease that causes progressive muscle weakness and loss of coordination.⁵

Early signs owners miss

Dogs with joint disease often walk more slowly or want shorter walks, are slower to stand up, struggle to get into the car, go reluctantly up stairs or stop jumping on the bed, sit with the hind legs stretched out in a "lazy sit", and may be irritable when touched in certain areas.¹ A bunny-hopping gait is one sign of hip dysplasia.²

Watch your dog's shape too. Loss of muscle on the rear limbs and a shift of weight onto the front legs are also signs of hip dysplasia, though many affected dogs show no obvious symptoms.⁶

Joint pain or nerve weakness? How to tell at home

Dogs with cruciate ligament pain in the knee often limp on and off, shift their weight away from the sore leg when standing, and hesitate before walking up stairs.⁴ Some will "toe touch", putting only a little weight on the sore leg.⁴

Nerve problems look different: the paw knuckles over so the dog walks on the top of the foot, the toes drag, and there is no yelp. With degenerative myelopathy, signs usually start in one back leg before involving both, and scuffed hind toenails are typical.⁵ It affects older dogs, typically over eight.⁷ If there is no sign of pain at all, our guide on back leg weakness without pain goes deeper; if your dog is crying out, read about yelping and back leg pain.

What the vet visit involves, and when to go today

Diagnosis comes first, because joint and nerve problems need different plans. For the knee, your vet checks for abnormal movement in the joint using hands-on stability tests.⁴ For hips, an X-ray taken under general anaesthetic is the preferred method.³ Where a spinal cause is suspected, testing may include a neurological exam, blood work, X-rays, scans and analysis of the fluid around the spinal cord.⁵

Go the same day if your dog collapses, suddenly drags both back legs, or loses bladder control. A complete cruciate rupture can also cause sudden severe lameness with no weight on the leg.⁴

Day-to-day dog joint pain relief that works

For dogs with hip dysplasia, keeping them very slim from a young age is the most effective and least expensive long-term way to keep them comfortable, paired with limited exercise such as leash walks of a length the dog handles easily.⁶ Getting to a healthy body condition is extremely helpful at relieving arthritic pain.¹ Keeping your dog moving maintains joint mobility and muscle tone,¹ and moderate daily exercise, while avoiding high-impact activities such as jumping, strengthens the structures around the joint.³ Short, frequent, flat walks beat one long one.

Physical therapy is highly effective at improving quality of life and should be part of any treatment plan.³ Certified rehabilitation practitioners offer laser therapy, hydrotherapy, ultrasound and muscle therapy.¹ Gentle back leg massage can fit here too.

Choosing a joint pain reliever for dogs

The choice of drug is your vet's call, but it helps to know there are several effective non-steroidal anti-inflammatory drugs, the anti-inflammatory painkillers used for this kind of joint pain.³ They can control pain effectively with few side effects.¹ Before starting them, your vet will recommend blood tests to check liver and kidney function,¹ with periodic monitoring afterwards.¹ A newer injectable treatment helped more dogs reach the pain-relief target than a dummy injection in testing.⁸ Never give human painkillers.

Remedies for joint pain in dogs: what holds up

Omega-3 fatty acids help relieve inflammation in arthritic joints and are proven to decrease pain in dogs with arthritis, while support for glucosamine and chondroitin comes mainly from small studies and anecdotal reports.¹ Cartilage protective supplements are often recommended, but peer-reviewed evidence that they repair or protect cartilage is lacking.⁶ Supplements are not tightly regulated, so some may not contain the labelled amount of ingredient.¹ Check any product with your vet before you start it.

Home changes that give the back end traction

Traction and fewer obstacles prevent the falls that set a sore dog back. Use steps or a ramp up to favourite spots, raise food and water bowls off the floor, and make every surface your dog walks on non-slip with carpet or yoga mats.¹ Some dogs need to be kept off stairs to prevent pain and falls.¹ A sling or harness for walking and standing, and booties to protect scuffed paws, are standard advice too.⁵

Where a rear support wheelchair fits

A wheelchair is for the stage where the back legs can no longer carry the dog safely, not for the first stiff mornings. A wheelchair to support the hind limbs is listed alongside slings, ramps and physical therapy as a management option.⁶⁵ A brace supports one joint; a cart supports the whole back end.

The OldPal Rear Support Dog Wheelchair carries weight through the hips and chest with a padded harness rather than through the spine, and the frame is set so the back legs hang free or lightly brush the ground. Dogs can squat and go to the bathroom in it.

Sizing uses one measurement: rear leg height from the top of the hip straight down to the toe pad, taken with your dog lying on its side. Five sizes cover 3 to 27 inches. Use the measuring guide and fit finder, or email help@oldpalpets.com with a photo and your measurement.

What to expect, by cause

Most arthritis damage is irreversible, so treatment aims to minimise pain and delay progression.¹ With hip dysplasia the outlook varies with overall health and joint damage, and dogs managed without surgery often need lifestyle changes to stay comfortable.² After cruciate surgery, good function should return within three months if you follow instructions.⁴ See our pages on back leg surgery and recovery afterwards. Degenerative myelopathy progresses to an inability to walk after six to twelve months, and management often involves ramps or steps, a sling or harness, booties and a wheelchair.⁵

Keeping track at home

Film your dog walking away from you and back, on the same flat surface, once a month, and keep a one-line diary: good day or bad day, how far you walked, how many tries it took to stand.

Frequently asked questions

Related guides

• Hip dysplasia in dogs
• Back leg weakness with no pain
• Knee surgery for back legs
• Pulled muscle symptoms in a back leg

Sources

Related guides

• Dog Hip Dysplasia Stance: What It Looks Like at Home
• Dog Joints Hurt: Signs of Joint Pain and What Helps
• How to Know If Your Dog Has Hip Dysplasia Before the Vet Visit
• Dog Dislocated Hip: Signs, First Aid and What Treatment Involves