Cruciate Ligament Rupture in Boston Terriers

Usually sudden hind-limb lameness, often with the toe just touching the ground. Many dogs improve partially over a week or two, which convinces owners it is healing, then deteriorate again as the unstable joint becomes inflamed.

A ruptured ligament does not repair itself. Some small dogs stabilise reasonably well with conservative management, weight control and rehabilitation, but the joint remains unstable and arthritis progresses. Surgery gives more predictable outcomes in most cases.

Both stabilising sutures outside the joint and procedures that alter the geometry of the shin bone are used in small breeds, and the choice depends on the dog's size, tibial slope, activity level and the surgeon's experience. Ask why the recommended option suits your particular dog.

It is the same disease earlier on. Partial tears typically progress to complete rupture, which is why a partly torn ligament is treated as a knee already on the way rather than an injury that might settle.

Some degree of arthritis follows cruciate disease regardless of treatment. Surgery slows its progression by stabilising the joint; it does not prevent it. Long-term weight control and muscle maintenance make a real difference to how much it matters.

A large proportion of affected dogs rupture the second cruciate within a couple of years, because the underlying degeneration is usually bilateral. That is a reason to prepare rather than to panic.

Absolutely, and it is the part owners most often shorten. A dog that feels well at three weeks and is allowed to run can undo the repair. Follow the graduated plan to the letter.