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What is Shoulder Dysplasia?

In the normal growth process of bones, cartilage should calcify and help to form solid bones. If the cartilage fails to be replaced by bone cells, it becomes abnormally thickened and unable to receive nutrients into all its cells, which can lead to malnourishment and cell death. This dying tissue can then become detached from the bone due to normal weight bearing, and form a flap that can reattach or break completely free.

Once this occurs, the condition is usually referred to as osteochondritis dissecans. Flaps that break free are called joint mice, and can be reabsorbed by the body or can remain in the joint and mineralize, causing further pain.

Shoulder dysplasia refers to a condition that affects large and giant breed puppies. Due to a defect in the normal growth process, the cartilage of the shoulder pulls away from the bone, resulting in pain and inflammation. If left untreated, the condition can lead to lameness in the affected limb. Often, the condition will affect both shoulders.

Symptoms of Shoulder Dysplasia in Dogs

Signs of a condition of shoulder dysplasia are usually evident between 4 to 10 months of age, and may be subtle. Even if your dog has shoulder dysplasia in both shoulders, usually only one is painful. Pain and shifts in weight can lead to a lameness that lessons with rest, but can become exacerbated with exercise. The lameness generally increases within a period of 3 to 4 weeks. Symptoms can include:

  • Inflammation in the shoulder
  • Shoulder pain
  • Swelling 
  • Stiffness 
  • Decreased range of motion
  • Muscle atrophy 
  • Limping 
  • Shifting weight
  • Reluctance to extend the shoulder
  • Abduction stance
  • Lameness
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Causes of Shoulder Dysplasia in Dogs

The cause of shoulder dysplasia has not yet been discovered, but there are many factors that are believed to contribute to this condition. Factors include:

  • Genetics
  • Excessive protein, calcium, energy, or phosphorus in the diet
  • Rapid growth
  • Hormones
  • Inadequate blood supply to the affected area
  • Trauma

Large and giant breeds seem to be predisposed to this condition by their very nature of increased weight bearing and rapid periods of growth, though shoulder dysplasia can affect smaller and medium dogs as well. Common breeds affected include:

  • Great Dane 
  • Golden Retriever 
  • Labrador Retriever 
  • Bernese Mountain Dog
  • Newfoundland
  • Rottweiler
  • Old English Sheepdog
  • English Setter
  • Great Pyrenees
  • Saint Bernard
  • Mastiff
  • Irish Wolfhound
  • Cocker Spaniel
  • Springer Spaniel
  • Border Collie
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Diagnosis of Shoulder Dysplasia in Dogs

Once you have noticed your dog limping, having pain, or going through periods of lameness, you should take your dog in to be checked. Your veterinarian will perform a physical exam, and a lameness exam, and will note areas of pain, inflammation, and atrophy. Your dog’s shoulder may be warm and swollen to the touch, and he may cry out when the joint is manipulated. A click may also be heard when the shoulder is hyperextended, an indication of a degenerative issue in the joint. At this point, your vet will most likely order imaging tests to better assess the problem.

X-rays, CT scans, and MRIs can reveal the state of the shoulder joint, and may be performed on both shoulders even if only one is painful. These techniques can reveal abnormal fluid or space in the joint, joint mice, and the presence of osteoarthritis. Shoulder arthrography may be helpful in discerning defects in the joint that are not seen in imaging techniques alone and involves a small incision in the shoulder joint to allow a camera to look inside. A definitive diagnosis of shoulder dysplasia is based on the results of these tests.

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Treatment of Shoulder Dysplasia in Dogs

Treatment of your dog’s shoulder dysplasia will depend on the severity of the condition, and is generally divided into non-surgical and surgical methods. 

Non-Surgical Treatments

More conservative methods of therapy are usually indicated for dogs with mild dysplasia that is accompanied by little to no pain. Restricting your dog’s exercise through strict rest and short leash walks can help the flap of cartilage heal on its own. This can be accompanied by range of motion exercises to maintain the joint’s flexibility. Often, the diet is modified to manage body weight, or to decrease the intake of calcium or calories, and supplements to aid in joint health may be added. Medications are often prescribed to help manage pain and inflammation, such as NSAIDS and steroidal or non-steroidal anti-inflammatories. Newer treatments include laser therapy and the administration of platelet rich plasma.

Some dogs will see improvement in their symptoms, but may need some physical therapy. Other dogs may only experience temporary pain relief, and may progress to osteoarthritis and permanent lameness. When the condition does not improve with non-surgical methods, surgery may be needed. Many of these conservative methods can also be used after surgery to aid in recovery.

Surgical Treatments

Surgery is recommended in more severe cases, such as when the cartilage breaks free of the bone and joint mice are present, and if the dog is over 8 months of age. Surgical procedures performed before that time may hasten the disease. Surgery aims to repair the cartilage by removing the cartilage flap from the joint and scraping away any defective cartilage tissue. This can relieve pain and inflammation, as well stimulate joint healing. Treatment is performed through an open surgical approach or through arthroscopic surgery, which is a minimally invasive method that lessens the disruption to internal tissues and decreases post-operative pain. 

Surgical treatments, along with postoperative supportive methods, are the therapy of choice for most owners and veterinarians as they can provide a 90% success rate with a full recovery. Removal of the defective cartilage also decreases the onset of degenerative joint diseases common with this type of joint dysfunction.

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Recovery of Shoulder Dysplasia in Dogs

During treatment or after surgery, your dog’s activity should be limited, and you may be given medications, a special diet, and joint supplements to administer to your dog in the following weeks of recovery. Your veterinarian will instruct you on types of exercises or activities that you can gradually begin to do with your dog after a period of time. 

Recovery with non-surgical methods is variable, and depends on the severity of the condition. Very mildly affected dogs can recover under these therapies, but more often, the symptoms return. Surgical methods carry an excellent rate of recovery, especially if they are performed before the disease progresses too far.

While there is still debate as to the cause of shoulder dysplasia, prevention may be possible with an appropriate diet that limits the intake of energy and calcium, as well as refraining from breeding affected dogs.

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Shoulder Dysplasia Questions and Advice from Veterinary Professionals

Need pet health advice? Ask a vet

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Airedale Terrier

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Seven Months

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Unknown severity

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0 found helpful

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Unknown severity

Has Symptoms

Limping

Our pup has been limping on and off since he came home. At first we figured it was growing pains since he was growing so fast. Then I noticed his elbow felt a bit off and the vet took x-rays and said that the elbow and ulna were defective and not growing properly and that he would need to have his leg amputated because she saw no way to reconnect it. I reached out to a few other vets and surgeons who all said something different. It’s been a hard because he’s very stoic and has no problem going up and down the stairs and running around with the kids. I’m not sure what to do.

Sept. 29, 2020

Owner

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Dr. Michele K. DVM

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0 Recommendations

Thank you for your question. Without knowing the actual injury or problem, it is hard for me to comment, unfortunately. I do think that if you are not sure, I would error on the opinion of a veterinarian who is not going to amputate, as that cannot be taken back. If you talk to a veterinarian who thinks there may be a treatment plan with medication, time or possible surgery, I would probably go with that option first. You can always amputate a limb, you cannot put it back on. I hope that everything goes well for him and he does well.

Sept. 29, 2020

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Boxer

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Nine

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Unknown severity

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0 found helpful

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Unknown severity

Has Symptoms

Lamness

Dog started limping out of nowhere and within 2 weeks he can barely put any weight on it. I sent in a pic and vet said looks like loss of muscle mass. Does it look like shoulder displasia? His other shoulder looks fine and there’s no muscle loss there.

Aug. 5, 2020

Owner

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Dr. Michele K. DVM

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Thank you for your question. Lameness can cause muscle loss, and this may be a problem with the joint more than the muscle. I think it would be best to have your dog seen sooner rather than later, although it does not seem like an emergency. I would try to get there dog in within the next few days if possible. I hope that all goes well.

Aug. 5, 2020

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Golden Retriever

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Two Years

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Unknown severity

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0 found helpful

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Unknown severity

Has Symptoms

Limping

It has been a slow process. Belle started showing signs of limboing about a week ago. She is a very active dog and loves to play in the field. So I just assumed that maybe she hurt her paw. I checked it out and I didn’t see anything. Fastward a week and she can barely stand an her right front leg. I have found a sore spot around her shoulder. I need help.

Aug. 1, 2020

Owner

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Dr. Michele K. DVM

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Thank you for your question, I'm sorry Belle is not feeling well. Since this has gotten worse, and not better, and since I cannot see her, it would be best to have a veterinarian look at her and see what might be going on. They will be able to examine her, see what might be wrong, and let you know what treatment is needed so that she feels better again. I hope that she is back to herself soon.

Aug. 1, 2020

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Hank

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Great Dane

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8 Months

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Serious severity

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1 found helpful

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Serious severity

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Shoulder Dysplasia

My Great Dane puppy was diagnosed with shoulder dysplasia after seeing an orthopedic and our regular vet and doing some extensive x-rays. Now that we are a few days away from surgery he is no longer limping he doesn't seem uncomfortable anymore and my husband of course says why spend all this money on surgery if he seems fine. My gut feeling is to proceed with the surgery. There's any input or feedback you have on the situation I would greatly appreciate it thank you

April 29, 2018

Hank's Owner

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Dr. Michele K. DVM

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1 Recommendations

If you had a specialist diagnose Hank with dysplasia, it is unlikely that the problem will resolve, and the older he gets, the harder it is going to be for him to recover. It would be a good idea to give the specialist a call, let them know what is going on, and see if they need to do any further exams before his scheduled surgery. I hope that all goes well for him!

April 30, 2018

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