If your dog goes lame in one of his hind legs, he may have torn or ruptured his cranial cruciate ligament, or CCL – similar to the ACL in humans. This ligament connects the back of the femur (the bone above the knee) with the front of the tibia (the bone below the knee). The CCL is responsible for keeping the tibia in place beneath the femur and stabilizing the knee joint.
There are multiple causes of dog CCL injuries, including activity, breed, age, and obesity.
CCL injuries in dogs are one of the most commonly seen orthopedic problems.
Depending on the severity of the CCL injury, a dog’s symptoms might range from having a hint of lameness to being unable to bear weight on the injured leg. A dog with a CCL injury may also have swelling on the inside of the knee.