Torn ACL in Dogs: Surgery, Recovery, and Long-Term Care

Your dog was running across the yard, enjoying the fresh Edmonton air just like always. Then, a sudden yelp changed everything.

Now they are holding up a back leg, looking at you with confusion and discomfort.

This moment feels overwhelming for any pet owner. You likely have many questions about whether they broke a bone, whether they need surgery, and how long the healing process will take.

A torn ACL in dogs, also called a cranial cruciate ligament (CCL) tear, is a very common injury. While it may feel sudden, the ligament often weakens over time before finally giving out.

Understanding what is happening inside your pet's knee helps you make the best decisions for their long-term health.

Understanding the Cranial Cruciate Ligament

Before discussing injuries, it helps to know how a healthy knee works.

The cranial cruciate ligament sits deep inside your dog's knee joint. It connects the thigh bone to the shin bone.

This ligament has two vital jobs. It prevents the shin bone from sliding forward and stabilizes the knee during walking and running. When this ligament tears, the bones no longer stay in place.

Every step creates abnormal motion that can cause inflammation and quickly lead to arthritis. Dogs do not heal from this the same way humans do because they cannot easily stay off the leg.

Without intervention, joint damage usually continues to worsen.

Why Dog Knee Injuries Happen

Many people think a torn ACL in dogs only happens during a rough fall. While accidents do occur, most cases come from gradual wear and tear.

Several factors can put your pet at a higher risk:

• Genetics: Breeds like Labrador Retrievers, Rottweilers, and Golden Retrievers are more prone to ligament issues.
• Weight: Carrying extra kilograms puts constant stress on the joints.
• Age: We often see this in middle-aged pets, though it can occur at any age.
• Activity Levels: Dogs who are quiet all week but very active on weekends may face a higher risk of injury.

If your dog tears the ligament in one knee, there is a high chance the other knee will eventually face the same issue.

This is why we focus so much on preventative care and weight management at Oxford Animal Hospital.

Signs of a Dog Knee Injury

The symptoms of a dog's knee injury depend on whether the tear is partial or complete.

Complete Tears

A complete rupture is usually easy to spot. Your dog will likely hold the leg off the ground entirely.

You might notice swelling around the knee or see them sitting with the leg kicked out to the side rather than tucked in.

Partial Tears

These are more subtle and can be harder to identify. You might notice:

• Stiffness after a long nap.
• Reluctance to jump onto the sofa or into the car.
• Muscle loss in the affected leg.
• A limp that seems to come and go.

If your pet is not putting weight on their leg, they need a prompt physical exam. Determining the cause quickly allows our veterinary team to start the right treatment plan.

Diagnosis and Treatment Options

To diagnose a torn ACL in dogs, we perform specific movements to check for joint instability. 

We may also use X-rays to look for swelling or signs of arthritis.

Choosing the Right Path

For most medium and large pets, surgery is the most effective way to restore movement. 

Common options include:

• Lateral Suture: A strong suture is placed outside the joint. This works well for smaller, less active pets.
• TPLO Surgery: This is often the preferred choice for active dogs. It changes the mechanics of the knee so the ligament is no longer needed for stability.

If you are looking into dog surgery in Edmonton, our team is here to explain these options in simple terms. We want you to feel empowered to make the best choice for your furry family member.

Supporting Your Pet Through Recovery

Recovery is a marathon, not a sprint. Your pet will need strict rest for the first few weeks. This means short leash walks for bathroom breaks only and no jumping or running.

By the second month, we often begin gradual increases in activity. Physical therapy can be a wonderful tool during this stage to help rebuild muscle.

Full recovery usually takes four to six months. Your patience during this time is the best gift you can give your pet.

Frequently Asked Questions

Can a Dog Recover Without Surgery?

Small pets under 10 kilograms sometimes manage with rest and medication, but they often develop permanent stiffness.

For larger dogs, surgery is almost always needed to prevent severe, painful arthritis.

How Do I Know if the Tear Is Getting Worse?

If your dog's limp becomes more consistent or they stop using the leg entirely, the tear has likely progressed. Early intervention helps prevent cartilage damage.

Are Joint Supplements Helpful?

Supplements like glucosamine or Omega-3 fatty acids support joint health, but they can’t fix a torn ligament. We recommend them as part of a long-term plan to manage arthritis.

What Is the "Sit Test" for Dogs?

When a dog has a sore knee, they often sit with the leg pointed out to the side because bending it fully is painful. If you notice this new sitting posture, it is a sign of knee discomfort.

Can I Prevent the Other Knee From Tearing?

While you cannot change genetics, keeping your pet at a healthy weight is the most effective way to protect their joints.

Regular, low-impact exercise also helps keep the supporting muscles strong.

Does a Torn ACL in Dogs Cause Long-Term Arthritis?

Yes. Joint instability causes bones to rub together incorrectly, wearing down cartilage and leading to inflammation.

While surgery slows this process, most dogs with this injury develop some arthritis as they age.

Early treatment and weight management are the best ways to keep your pet comfortable.

Is It Safe to Use a Knee Brace Instead of Surgery?

Knee braces provide external support but cannot replace the internal stability of a healthy ligament. They are often difficult to fit and may offer a false sense of security.

We typically only suggest braces for pets who aren't surgical candidates.

Please consult us before using one to ensure it doesn't cause further harm.

A Reliable Partner in Your Pet's Health

Dealing with a torn ACL in dogs is challenging, but you do not have to do it alone. 

Our goal is to provide the compassionate, expert care your pet deserves to get back on their paws.

If you notice your pet limping or showing signs of discomfort, we can help. 

Schedule an appointment with us today to discuss a personalized care plan for your pet.

Have a Question Specific to Your Pet?

While our articles provide great guidance, nothing replaces a one-on-one conversation. We’re here to help.