Tag archives: dog genetic test

Genetics play an enormous role in the health of dogs walking through the doors of any veterinary hospital. However, the treatment of an animal with an inherited disease rather than proactive testing of the genetic mutations responsible for disease has been the traditional role of the veterinarian. With an increase in the availability of canine genetic disease testing and great improvements in the ease and convenience of ordering genetic testing through Paw Print Genetics, more and more dog breeders and their clients are having genetic testing performed preemptively and learning the benefits of these powerful technologies. As a veterinarian, understanding the basics of genetic testing and how genetic test results can be used to prevent and diagnose disease will keep you current and prepared for your clients as these technologies inevitably become a more significant part of clinical veterinary practice.

One of the more challenging but important aspects of canine genetic testing is deciding what recommendations to make when a dog or one of its relatives are found to be at risk for (or affected with) an inherited disease. Appropriate testing recommendations for the relatives of affected dogs may be crucial for prevention of additional affected puppies and identification of ...

The breeding of dogs identified as genetic carriers of recessive disease is a hotly debated topic in the canine breeding world with many breeders firmly entrenched in their own personal approach to the issue. With increasing regularity, dog breeders and their clients are bringing genetic questions (including those about breeding carriers) to their veterinarians under the assumption that most veterinarians would be up to speed on the current information and genetic testing available. Unfortunately, at Paw Print Genetics we occasionally speak to breeders whose veterinarians have given them advice about breeding carriers that may not be in the best interest of the kennel or the breed. Given the large number of variables and differences between the way kennels are operated and the recessive disease risks of individual breeds, there is not necessarily a breeding approach that would be appropriate in 100% of cases. However, understanding some guiding principles and the potential ramifications of doing so, can help a veterinarian advise their dog breeding clients in a way that will help them meet their goals without increasing the incidence of recessive diseases in a kennel or in the breed.

What is a “Carrier” of a Recessive disease?

As a quick refresher ...

Some of the most emotionally challenging canine cases seen in the veterinary hospital are those involving serious illnesses of newborns or young puppies. Owners’ joyous expectations of a long, healthy relationship with their new puppy makes a disease which decreases that puppy’s quality of life or results in early euthanasia, all the more heartbreaking. Though infectious diseases like parvovirus are often of particular concern in young pups, some puppies ending up on the exam room table show signs of one of a wide array of inherited diseases caused by a known genetic mutation. Unfortunately, limitations in available therapies for many inherited diseases often lead to frustrating and emotional outcomes for all the parties involved; veterinarians and veterinary staff included. Thereby, making prevention of inherited disease through the use genetic testing, an essential part of healthy dog breeding.

Historically, methods to prevent inherited diseases have been limited to selective breeding practices. However, an inability to identify asymptomatic carriers of recessively inherited diseases or dogs in the preclinical phase of late-onset inherited diseases, have traditionally made great reductions in disease incidence difficult to obtain through selective breeding alone. Genetic testing is now playing an important role in identifying these dogs such that ...

Veterinarians examine, treat, and diagnose dogs with inherited diseases daily. Though treatments to fix some inherited disorders such as cryptorchidism and umbilical hernias are relatively safe and effective, rarely are the inherited disorders seen in practice remedied with a simple, relatively low-cost solution. In fact, in many cases of inherited disease, treatment options are extremely limited or non-existent. Therefore, an option to prevent these diseases before they occur would be preferable in most circumstances. Genetic disease testing made possible by the discovery of the causal mutations has become the best medicine to combat many inherited conditions.

Genetic testing of dams and sires has become commonplace in many dog breeds as breeders have recognized the power of identifying those dogs at risk of producing puppies with inherited diseases. Unfortunately, however, some breeders have been slow to adopt the routine use of genetic testing as they continue to rely on traditional selective breeding techniques. Limited by the inability to identify unaffected carriers of disease, selective breeding has historically proven relatively ineffective in the pursuit of large reductions in disease incidence.

Adult and late-onset inherited diseases pose an extra challenge in selective breeding because dogs become sexually mature before signs of the disease ...

The liver disease, copper toxicosis (CT) has become a hot topic among Labrador retriever breeders and dog owners with the arrival of a new genetic test which identifies two recently described mutations found in Labradors associated with opposite effects on the amount of dietary copper stored in the liver. As with all new canine genetic tests, questions and concerns may arise from breeders about how to interpret their dog’s test results, how to use this information to maintain the health of their dog, and how to use the information for their breeding program.

What is liver copper toxicosis?

Copper toxicosis is an inherited metabolic disease affecting Labrador retrievers and other breeds, which can result in chronic liver failure. Dogs with copper toxicosis have a decreased ability to excrete dietary copper from the body resulting in excessive copper storage in tissues and organs, including the liver, which can result in liver damage, subsequent cirrhosis and the inability of the liver to function properly. Though the age of onset and speed of disease progression are variable, most affected dogs will present in middle age with non-specific signs of liver dysfunction including weight loss, lethargy, weakness, vomiting, diarrhea, and abdominal pain. In late ...

The expanding role of the dog over recent decades as an anthropomorphized member of the modern American family has led to an increase in dog owners’ expectations of their veterinarians. With social media, where the old adages about the number of people a dissatisfied client will tell about their experience can be easily multiplied by a factor of hundreds, the pressure to meet client expectations is more intense than ever.

Far more actionable than the commonly used genetic testing for canine breed identification, canine genetic disease testing is an accurate and reliable tool to help veterinarians meet their clients’ expectations in new ways. Genetic testing for a variety of inherited diseases has become commonplace in the dog breeding community to help breeders produce puppies free of particular maladies. However, as we know, not every dog seen in practice is the product of two purebred parents which have been genetically tested and vetted to make sure they are a good genetic match. Having a solution to easily perform canine genetic disease testing for any dog in a clinical setting, no matter the breed, adds a level of sophistication and progressiveness to your practice which can also supplement and improve your overall ...

The clotting disorder known as von Willebrand disease (vWD) is a relatively common and potentially lethal disease of dogs. Three general types of vWD (types I, II, and III) have been described based upon the specific genetic cause and level of deficiency in a protein known as von Willebrand factor (vWF), which plays an important role in blood coagulation. Dogs deficient in vWF protein are at risk of potentially life-threatening bleeding episodes when undergoing surgical procedures or as a result of traumatic injury. Therefore, when a relatively high frequency of Boykin spaniels was identified in the Paw Print Genetics (PPG) laboratory to carry a mutation in the VWF gene previously associated with vWDII in German shorthaired and wirehaired pointers (Kramer and colleagues), Boykin spaniel lovers and our team at Paw Print Genetics (PPG) were understandably concerned.

Concern turned to confusion as Boykins expected to be at risk for vWDII (based upon their genetic testing results) failed to show any signs of a clinical clotting disorder. In addition, results of additional blood tests looking at the product produced by the gene on several “at-risk” dogs showed no deficiency in vWF protein and no increase in blood clotting times. At that time ...

Since we started working with the Boykin Spaniel Society (BSS), both Paw Print Genetics (PPG) and the BSS have learned much about the genetic disease concerns of these wonderful, little brown dogs. By using the founder breeds of the Boykin as a guide, PPG developed the first Boykin spaniel inherited disease testing panel in 2014. Based upon the results collected over two years of testing Boykins, in September 2016, the original disease testing panel was split into two panels; the Boykin spaniel essential panel (containing the most clinically important and/or common diseases) and the supplemental panel (containing diseases of less clinical importance and/or lower incidence).

Two of the four diseases on the Boykin spaniel essential panel are inherited diseases of the eye. Diseases resulting in vision loss or blindness are among some of the most life-altering and troublesome non-lethal diseases of dogs. However, with knowledge of a specific genetic mutation resulting in blindness as well as an understanding of how that specific eye disease is inherited, blindness caused by the mutation can be prevented through the use of genetic testing and informed selective breeding practices based upon test results. Two eye diseases known to be inherited in the ...

You’ve spent a small fortune and an immense amount of time selecting, purchasing, socializing, and training your young Labrador retriever, Charlie, for the big hunt. It’s the first hunt of his career and he’s amped! As you are getting everything out of your truck, you let Charlie out of his crate to run around and explore a little. He disappears for several minutes as you are getting your gear and you call him back to you. However, when he returns, you notice that Charlie seems wobbly in his rear end and eventually his hind limbs collapse. He attempts to keep running, but drags his hind limbs for a short distance before giving up and lying down. Uncharacteristic for Charlie, he won’t get up when you call him and he no longer seems to be as interested in the hunt. After comforting Charlie for several minutes, he gets back up on his feet, though you can still see that he is a little wobbly. After several more minutes, Charlie is back to his jovial self with little indication that anything was wrong.

Unfortunately, the scenario described here is not a terribly uncommon story among Labrador owners and those that hunt with ...

One of the happiest days of my life was bringing home a German shepherd puppy to join our family. Like many parents, my wife and I wanted our only son Brandon, who was 5 or 6 years old at the time, to grow up around dogs and help us teach him some responsibility. We visited a family with a litter of 7 week old puppies to let Brandon pick the one that was going to be his buddy while he grew up. Brandon decided on the quietest pup in the litter to become our new dog, Griffey. Our journey with Griffey (Griff for short) began with Brandon and his new companion in the back of our convertible in route to the home we were excited to share with our new family member. My wife and I were hopeful that Griff would give Brandon a best friend for 10 to 13 years. Unfortunately, that wasn’t exactly how things worked out.

Signs of Trouble

We spent many years loving Griff and giving him the best years of his life. Brandon and Griff were inseparable as they aged. They played together, they napped together, and they got into trouble together. At about 8 ...