Skip to main content

Many big dogs get hip dysplasia, that's a fact. If you have owned several large dogs, you may have wondered why big dogs get hip dysplasia and how you can prevent them from getting this debilitating condition. 

Actually, to be correct, not all large dogs are prone to hip problems. There are certain large dog breeds that are curiously almost immune to hip dysplasia.

 Before you head out to buy a small dog in hopes of not encountering future hip problems, consider that small and medium-sized dogs are prone to their own set of orthopedic problems. 

Actually, some of them may even have a higher incidence of hip problems compared to some larger dogs!

The Role Of a Dog's Hips

The dog's hips connect the bones of the hind legs with the pelvis. Composed by the femur bone and the acetabulum, the hip joint is medically known as the acetabulofemoral joint

This ball and socket joint is one of the most important joints found in the dog's body. The primary role of a dog's hips is to support the dog's weight and allow stability whether the dog is standing or in movement.

Normal Hip Anatomy in Dogs 

To better understand hip dysplasia, it's important to understand the normal anatomy of a dog's hips. 

In a dog with good hips, the spherical end of the femur bone fits snugly into the concave socket of the pelvis (acetabulus). 

The surfaces of both joints are covered by a slippery tissue called articular cartilage, which is lubricated by a thin film of synovial fluid, a fluid with an egg-white consistency whose purpose is to reduce friction between bones during movement.

Photo credits: Hip displasia in dog, Joelmills, Wikipedia, Creative Commons Attribution-Share Alike 2.5 Generic license

Photo credits: Hip displasia in dog, Joelmills, Wikipedia, Creative Commons Attribution-Share Alike 2.5 Generic license

Abnormal Hip Anatomy

In a dog with hip dysplasia, the femur does not fit correctly into the pelvic socket, triggering a cascading chain of problems.

Eventually, the cartilage wears through. This condition is called hip dysplasia. Hip dysplasia is a common form of osteoarthritis. 

At first, hip dysplasia causes no clinical signs, but once sufficient wear and tear has occurred, there is pain and associated lameness.

Because the fit is not as snug as it's supposed to be, there is therefore increased wear and tear as the dog moves. 

This leads to the development of secondary degenerative joint disease, pain, lameness, and eventually debilitation.

A Matter of Nature

When it comes to hip dysplasia, there appears to be a strong genetic component at play. Hip dysplasia is known as being an inheritable condition taking place when defective genes are passed from one generation to another. 

For this reason, reputable breeders are very careful in having their breeding stock tested for good hips before being allowed to reproduce. 

By carefully screening for bad hips, breeders can reduce the incidence of passing down genetic problems from one generation to another. Completely eradicating the disease from a specific breeding line can be challenging at times.

Discover More

shame

Why Do Dogs Rub Their Faces?

Many dogs rub their faces, but there is face rubbing and face rubbing in dogs. While the occasional face rub may be normal, excessive face rubbing in dogs warrants a trip to the determine what may be going on. Veterinarian Dr. Jennifer Masucci shares possible causes of excessive face rubbing in dogs.

bernese

Discovering the Bernese Mountain Dog's Coat

The Bernese mountain dog is blessed with a heavy coat that requires some extra care. If you are planning on adopting a puppy or dog of this breed, it's important knowing more about the characteristics of this dog's coat and what type of care it needs. So let's discover more about the Bernese Mountain dog's coat!

setters

Discovering Different Types of Setter Dog Breeds

There are different types of setter dog breeds out there and each of them are blessed with their own unique characteristics. There are setters and setters in the dog world! Discover the different types of setters and what sets them apart so that you become a pro in identifying them.

Hip dysplasia is more common in large, fast-growing dog breeds such as German Shepherds, Golden Retrievers, Labrador Retrievers, Newfoundland Dogs, Rottweilers and Saint Bernard. 

"Genetics, however, is only one of the predisposing factors leading to hip dysplasia. Experts say that heredity accounts for about 25 percent of a dog’s chance of developing this condition, " explains veterinarian Dr. Ivana Crnec. 

Rottweilers are big dogs predisposed to hip dysplasia

Rottweilers are big dogs predisposed to hip dysplasia

A Matter of Nurture

Other than genes, the environment in which dogs who are genetically susceptible to hip problems may act as an aggravating factor to hip problems. 

The amount of calories a dog consumes and increased body weight have been known for increasing the severity of hip problems in genetically susceptible animals since extra weight contributes greatly to the degeneration of the hip joints in a dog.

 Rapid growth in puppies and strenuous exercise at a young age are other contributing factors. 

According to the Baker Institute for Animal Health slowing down the growth rate during a puppy's early months of life can, not only lessen the severity of hip dysplasia, but possibly even prevent it.

 Interestingly, according to Wayne H. Riser, a veterinary pathologist and founding president of the World Small Animal Medical Veterinary Association, hip dysplasia has not been reported in wolves and foxes, and this is likely because they are slow growing and late maturing species.

The Role of Body Type

As mentioned, breeds most commonly affected by hip dysplasia include German Shepherds, Rottweilers, Golden Retrievers, Great Danes and St. Bernards. Why are large and giant breeds overrepresented when it comes to this condition?

 Body type seems to matter. According to Dr. Frank Borostyankoi, a Diplomate of the American College of Veterinary Surgeons this is likely due to the fact that in these breeds more stress is placed on the ligaments and joints because of their body weight.

Exceptions to the Rule

Interestingly, there are several large dog breeds which are less predisposed to hip dysplasia. According to veterinarians, Dr. Foster and Smith, sighthounds such as the Greyhound or the Borzoi have a very low incidence of hips dysplasia. Why is that?

 Dr. Frank suggests that it's likely because greyhounds and whippets are lightweight breeds. However, according to the Textbook of Small Animal Surgery, Volume 1, while these breeds are at lower risk for hip dysplasia, it doesn't necessarily mean they are exempt from developing it.

Pugs, despite their diminutive side rank high for dysplastic hips

Pugs, despite their diminutive side rank high for dysplastic hips

Not only Large Dogs

According to board-certified veterinary surgeon, R.D. Montgomery in an article for DVM360, dogs of all breeds and sizes have been found to have hip dysplasia and even some relatively small dogs like the American Water Spaniel have a very high incidence of hip dysplasia.

 If we look at statistics provided by the Orthopedic Foundation for Animals, we may be shocked to see that the bulldog, a breed weighing about 50 pounds is at the very top of the list as the dog breed with the highest frequency of dysplastic hips, while second place is held by the pug, a dog breed merely weighing in at 20 pounds!

Did you know? According to the Institute of Canine Biology, all dogs are born with a normal set of hip joints at birth. Things start to deteriorate when the congruity between the femoral head and the acetabulum is disrupted.

Now That You Know...

As seen, big dogs get hip dysplasia due to a variety of reasons ranging from genetics to diet and body type. It goes without saying sourcing puppies from reputable breeders who test their breeding stock's hip and selectively breed to weed out the problem. 

If you have a large breed puppy, you may be interested in this veterinary-written article: How Do I Know if a Puppy Has Hip Dysplasia?

Related Articles