How to Diagnose a Dislocated Shoulder in Canines

It is immediately apparent when your dog has dislocated a shoulder.
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Canine shoulder dislocation is sometimes also called luxation. As you might expect, especially for an animal that walks on its shoulder joint, so to speak, a dog with a dislocated shoulder has a crippling and painful injury. This condition can afflict dogs of any size or breed and can sometimes be a congenital (present from birth) condition.

Owners may notice a sudden limp or a diminished desire to play or run after a leg injury. These injuries range from mild to severe, so symptoms are not always immediately apparent. Even partial dislocations, or subluxations, are a taxing and uncomfortable experience for your pet.

What is joint luxation?

Joint luxation is the medical term for dislocation. This means complete separation between the bones that unite their movement to form a joint. Subluxation means the bones that form the joint have partially separated. The most common dislocated joints in dogs include the shoulder (also called the hip) and elbow, although any joint can be affected.

While it may be easy to diagnose a dislocated shoulder in canines, because it changes their behavior so drastically, there is no safe way to treat a dog with a dislocated shoulder at home without first taking the dog to the veterinarian. The veterinarian will need to determine the severity of the injury to determine how best to treat the dog. There are 25 muscles involved with holding the shoulder in place, and dislocations usually involve tears in the muscles that need to be treated under professional care.

There are a variety of causes for joint dislocation, but trauma, such as an automobile accident, is the most common cause other than a dog with a genetic predisposition to the condition. According to VCA Hospitals, some large breed dogs such as Labrador retrievers and German shepherds are more prone to hip dysplasia, which means their hip bones are more likely to partially dislocate.

Signs of canine shoulder dislocation

The canine shoulder is the joint closest to the dog's body. The canine elbow is the joint in between the paw and the shoulder. The most common signs of canine shoulder dislocation are a sudden reluctance to walk or jump, limping, pain near the joint, swelling of the joint, and constant licking of the joint.

A dog with a dislocated elbow has a condition in which one of the three bones in the elbow—the radius, ulna, or humerus—do not fit together as they should. This could be due to growth abnormalities, genetics, trauma, excess weight, and other reasons.

A dog with a dislocated elbow is commonly seen in large or giant breed dogs. In larger dogs, both elbows are likely affected, unless the dislocation is the result of a trauma. According to the American College of Veterinary Surgeons, once an elbow joint has been damaged, inflammation and further cartilage damage occurs. This usually leads to progressive elbow problems such as arthritis and loss of function.

Diagnosing canine shoulder dislocation

The shoulder joint is a ball and socket joint. With numerous muscles all working together to control the movement, the shoulder has a lot of work to do. It must support the dog's weight, help it change direction, and withstand the force of running and jumping. When there's an obvious trauma, such as a car accident, diagnosing canine shoulder dislocation is relatively easy.

In the absence of an obvious cause, VRCC Veterinary Specialty and Emergency Hospital says that they look for these symptoms to point them toward the diagnosis of a canine shoulder dislocation:

  • Lameness
  • Refusal to turn a specific direction
  • Shorter gait (smaller steps)
  • Inability to put shoulder in normal position

According to Manchester Veterinary Specialists, medical history could turn up a red flag, as could a physical examination. If a dislocated shoulder is suspected but not confirmed, your veterinarian may need to use an X-ray, a CT scan, or magnetic resonance imaging (MRI) to confirm the diagnosis.

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