A cruciate ligament injury is one of the most common reasons a dog starts limping on a back leg. Only your vet can examine the knee and tell you what is going on. This guide explains the words you may hear and the questions worth asking.
What the cranial cruciate ligament does
The cranial cruciate ligament (CCL) sits inside the knee (stifle). It stops the shin bone from sliding forward under the thigh bone when the leg takes weight. In people the same ligament is called the ACL.
Signs owners often notice
- Limping on one back leg, sometimes suddenly after play.
- Sitting with one back leg pushed out to the side.
- Stiffness after rest that eases a little with walking.
- Reluctance to jump into the car or onto the sofa.
These signs can have other causes too, so they are a reason to see your vet, not a diagnosis.
Surgery or managing without surgery
Vets choose between surgery and conservative (non-surgical) management based on the dog's size, age, activity and general health, and on how unstable the knee is. Ask your vet why they recommend one route for your dog, and what recovery would look like.
Conservative management usually combines several things your vet plans with you: rest and controlled lead walks, keeping a healthy weight, pain relief prescribed by the vet, and gradual exercises, sometimes with a physiotherapist.
Where a knee brace can fit in
Some vets suggest a knee brace as one part of that plan, to support the leg and limit movements the knee should avoid while it settles. A brace does not repair a ligament and is not a replacement for veterinary care.
If your vet agrees a brace is suitable, fit matters more than anything else: a brace that slides down a tapering leg does little. Look for one that is held up by a vest, collar or strap, and measure carefully using the product's size chart.
Questions to ask your vet
- Is a brace suitable for my dog, and for how many hours a day?
- Which activities should we avoid, and for how long?
- Which signs mean we should come back sooner?
A brace supports and stabilises; it does not diagnose or heal. If your dog is limping, in pain or recovering from surgery, ask your vet whether this support suits your dog and for how long it should be worn.