We have yet to see a study that links an
increased incidence of hip dysplasia in dogs fed a normal diet of commercial puppy food versus a specialty diet formulated for just large breed dogs.
For instance, the Orthopedic Foundation of America states that, «the English Bulldog has the highest
incidence of hip dysplasia of all breeds, 74 % are dysplastic».
Breeds of dogs with a high
incidence of hip dysplasia include Akitas, German Shepherds, Labrador Retrievers, Golden Retrievers, Rottweilers, Newfoundlands, and Chow Chows.
There is also higher incidence of hip dysplasia [a condition affecting the hip joint] among the bigger breeds.»
«Veterinary research has shown that puppies oversupplemented with vitamins, calcium, and phosphorus have a
greater incidence of hip dysplasia, panosteitis, osteochondritis, cervical vertebral instability, and other bone and joint abnormalities than puppies fed a balanced food,» Zink said.
Research also shows that puppies that have constant (ad libitum) access to food have more hip - joint laxity at 30 weeks and higher
incidence of hip dysplasia at 2 years than their counterparts consuming 25 - percent less food on restricted feeding schedule.
And, there may be a lower
incidence of hip dysplasia in dogs and bitches who are spayed and neutered after they are five months old (or after a first season for bitches).
Large - sized breeds with a relatively
low incidence of hip dysplasia include the Borzoi, Doberman Pinscher, Great Dane, Greyhound, Irish Wolfhound and Siberian Husky.
Even in Germany, where the kennel club has very tight breeding restrictions,
the incidence of hip dysplasia in German Shepherds is still 7 %.
Over fifty years later, despite increased testing rates,
the incidence of hip dysplasia is not going down in most breeds.
Over twenty years later, the number of dogs presenting with this disease prompted the Swedish Kennel Club to become one of the first to develop a program to reduce
the incidence of hip dysplasia.
Any breed or mix can be dysplastic; however, there are almost no statistics regarding
the incidence of hip dysplasia in non-purebreds as these dogs are seldom x-rayed.
Breeders can reduce
the incidence of both Hip Dysplasia and Patellar Luxation by the help of their veterinarian.
In the past few years, some radicals have blamed purebred breeders for
the incidence of hip dysplasia and used this accusation to encourage people to adopt mixed breed dogs from shelters.
There is a genetic component in
the incidence of hip dysplasia.
OFA is the Orthopedic Foundation for Animals and is an organization that was created to aid breeders in helping reduce
the incidence of hip dysplasia.
For instance, dogs neutered before the age of 1 saw a 100 percent increase in
the the incidence of hip dysplasia, a joint disorder.
In February, 2013, a study of Golden Retrievers, recording
the incidence of hip dysplasia (HD), cranial cruciate ligament tears (CCL), lymphosarcoma (LSA), hemangiosarcoma (HAS), and mast cell tumors (MCT) was published.
Dr. Frederick Hutt, author of a notable text on genetics, wrote of «genetic selection to reduce
the incidence of hip dysplasia» and HD as «a good example of a defect that is polygenic».
The incidence of hip dysplasia is greatest in large breed dogs.
The breed, as with other large dogs, has
some incidence of hip dysplasia.
As an example, Main coon cats have a higher
incidence of hip dysplasia, making them more likely to have a subluxated hip joint.
We also know that we can increase
the incidence of hip dysplasia if we choose to use dysplastic animals for breeding.
Kealy, R. Effects of limited food consumption on
the incidence of hip dysplasia in growing dogs.
In a large study done in 1997, Labrador Retriever puppies fed a high protein, high calorie diet free choice for three years had a much higher
incidence of hip dysplasia than their littermates who were fed the same high calorie, high protein diet but in an amount that was 25 % less than that fed to the dysplastic group.
We can greatly reduce
the incidence of hip dysplasia through selective breeding.
We know that through selectively breeding animals with good hips, we can significantly reduce
the incidence of hip dysplasia.
To decrease
the incidence of hip dysplasia in future generations, no dog that is in a high - risk breed should be bred until radiographs of its hips have been taken.
Results published by the OFA suggest that
the incidence of hip dysplasia in certain breeds has decreased as a result of selective breeding programs.
Certain breeds of dogs such as Labrador retrievers and German shepherds have a higher
incidence of hip dysplasia, making them more likely to have a subluxated hip joint.
OFA was established in 1966 to evaluate hip radiographs in an attempt to reduce
the incidence of hip dysplasia.
The OFA lists Great Danes as being ranked 88th among the breeds for
the incidence of hip dysplasia.
Although show Greyhounds have
some incidence of hip dysplasia, the condition seems to be absent in racing Greyhounds.
All breeding small dogs and cats should be OFA certified for hips and patellas, due to
incidence of hip dysplasia and luxating patellas.
The OFA is an organization with a goal of reducing
the incidence of hip dysplasia (though now it is also possible to obtain certification for elbows, thyroid function, and other issues).
The «Swedish Study» cited by Dr. Gerry Schnelle offered irrefutable evidence that selection of breeding partners based on radiographs failed to reduce
the incidence of hip dysplasia.
Several factors have also been found to increase
the incidence of hip dysplasia in growing dogs.
Although these breeds were selected for the study because of their relatively high
incidence of hip dysplasia, the study seems to indicate that stairs represent a strain on any puppy's joints, so consider ramps or carrying your puppy down any stairs if possible.
If somebody was to submit a grant proposal to test a treatment that promised to reduce
the incidence of hip dysplasia in dogs — not by 10 %, or even 25 %, but 50 % — I should hope it would receive very serious consideration for funding.
On the flipside, the breed has a very high
incidence of hip dysplasia.
Some research indicates that feeding puppy food for too long can increase
the incidence of hip dysplasia in dogs that are susceptible to it.