Author archives: Casey Carl

What’s the Deal with von Willebrand Disease II? - An Important Update for the Boykin Spaniel

What’s the Deal with von Willebrand Disease II? - An Important Update for the Boykin Spaniel

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 ...

What To Test? - Selecting Sample Types for Genetic Testing

What To Test? - Selecting Sample Types for Genetic Testing

With canine genetic disease testing becoming an increasingly common practice in both pets and breeding dogs, more and more veterinarians are being tasked with assisting their clients with sample collection for genetic testing. Paw Print Genetics (PPG) accepts a large variety of sample types that can be used for DNA extraction. In some cases, certain sample types may be much more convenient or logical to submit for testing than others.

Don’t Turn a Blind Eye to Inherited Disease - Preventing Blindness Through Genetic Testing

Don’t Turn a Blind Eye to Inherited Disease - Preventing Blindness Through Genetic Testing

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 ...

Genetic Disease Testing and the Hunting Labrador- Protecting Your Investment

Genetic Disease Testing and the Hunting Labrador- Protecting Your Investment

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 ...

Genetic Testing of the Symptomatic Dog

Genetic Testing of the Symptomatic Dog

It does not come as a surprise to veterinarians that many of the diseases they see in clinical practice have a hereditary component. If a genetic disease is amenable to treatment, veterinarians are typically well equipped to improve quality of life based upon their patient’s clinical signs. However, since clinical signs alone don’t always point to a specific definitive diagnosis, veterinarians treating inherited disease are often left with unanswered questions about the root cause of the medical problem. Paw Print Genetics offers genetic testing for over 140 different genetic diseases to help veterinarians shorten their list of differential diagnoses and identify the specific genetic mutation responsible for causing the clinical signs they are seeing, thereby, allowing for more specific therapies and recommendations to be made for the benefit of their patients.

Breed Specific Genetic Testing

Many inherited conditions seen in dogs are breed specific or have only been described in particular breeds or breed groups. For instance, one specific mutation in the canine HSF4 gene responsible for early-onset hereditary cataracts has only been described in the Australian shepherd and closely related breeds. Searching a specific breed or symptom on the Paw Print Genetics website will simplify the process of choosing ...

Prevention Is Smart Breeding- PFK Deficiency in the English Springer Spaniel

Prevention Is Smart Breeding- PFK Deficiency in the English Springer Spaniel

Likely originating in Spain, the spaniel family of dogs have long been important companions to bird hunters around the world. As late as the 1880’s, springer and cocker spaniels were born in the same litters and were only differentiated by size after birth. Dogs under 28 pounds were considered “cockers” and were used for their ability to hunt the small wading bird known as the woodcock while the larger “springers” were used to flush game birds to be captured by trained birds of prey (which were later replaced by firearms). Separate breed status for cocker and springer spaniels was established in 1902 by the Kennel Club of England and the English springer spaniel (ESS) was formally recognized by the American Kennel Club in 1910. Since that time, the ESS has been further differentiated into the leaner and less densely haired “field” variety and the heavier boned and thicker coated show or “bench” lines.

Like other breeds, along the historical path to the modern ESS, the breed has developed some inherited disease concerns that keep breeders on their toes. Luckily, some of these inherited diseases can be eliminated from blood lines though the use of genetic testing technologies and selective breeding ...

Prevention is Smart Breeding- Cystine Bladder Stones in the Newfoundland Dog

Prevention is Smart Breeding- Cystine Bladder Stones in the Newfoundland Dog
'Scout' courtesy of Brad Geddes via Flickr, Creative Commons license

From its early history as a North American working dog used to retrieve fishing nets and perform human water rescues, the beautiful and intelligent Newfoundland dog has carved out a well-deserved place in the heart of dog lovers around the world. Their characteristic large size, marked by heavy bones, powerful musculature, webbed feet, and thick hair coat make the Newfoundland particularly adept at tasks involving swimming. However, they are just as capable and content pulling carts on land and performing other land-based tasks. In addition, their generally calm, loyal, and affable temperament have helped establish them as great family dogs.  

Over the years, Newfoundland breeders have selectively bred dogs that have displayed the most desirable characteristics in an effort to improve their breed. Unfortunately, alongside these desirable traits, sometimes the predisposition to produce offspring with certain inherited diseases are also silently passed from generation to generation in the form of genetic mutations. Such a genetic mutation found in the canine SLC3A1 gene (first described in 2000) is responsible for a potentially life-threatening condition in the Newfoundland known as cystinuria. Luckily for Newfoundlands and those that love them, cystinuria can be eliminated from most blood lines through the incorporation of ...

Integrating Genetic Testing Into Veterinary Practice- Mixed Breed or Pure Bred Pet Dogs

Integrating Genetic Testing Into Veterinary Practice- Mixed Breed or Pure Bred Pet Dogs

For many years, an extensive physical exam, fecal sample testing, vaccinations, and deworming have been the mainstays of new puppy veterinary visits. While all of these tried and true steps are crucial in making sure that a puppy is healthy and stays that way, advances in genetic testing technologies are now revolutionizing the veterinarian’s approach to addressing and anticipating potential health issues in young dogs. Though inherited diseases are seen by veterinarians on a frequent basis, many veterinarians do not realize that genetic testing for diseases is available or understand how clinically helpful testing puppies at their first visit can be. How often do you discuss puppy genetic testing with your clients?

How Can Genetic Testing Improve Veterinary Practice?

The implications that genetic testing results can have for a dog’s veterinary care vary by a specific disease’s age of onset, progression, and clinical signs. Early diagnosis of late-onset inherited diseases allows for your clients to become educated about what to expect and in some cases, take preventative measures and plan for life changes. Knowledge that a dog is at-risk for a particular late-onset disease also allows for early diagnosis and implementation of early treatment when possible. In some cases, clients ...

Integrating Genetic Testing Into Veterinary Practice- Breeding Dogs

Integrating Genetic Testing Into Veterinary Practice- Breeding Dogs

Most veterinarians are well aware that canine hip and elbow radiographs, echocardiograms, and eye examinations have become routine veterinary health clearances requested by dog breeders. The goal of these diagnostics is to help breeders to improve their blood lines and produce healthy puppies. However, unless you work in a practice with a heavy canine reproduction case load, it is likely that you are less familiar with the genetic testing employed by breeders, what genetic tests are available, and how the results of genetic testing can help your dog-breeding clients attain their goals. Now that genetic testing has become a common addition to other pre-breeding canine health testing, gaining an understanding of available genetic testing and offering a service to help your clients complete their genetic testing through Paw Print Genetics (PPG), may increase the value of your customer relationships and build client loyalty, while at the same time, fulfilling your veterinary goal to improve the quality and length of puppies’ lives. How often do you discuss genetic testing with your dog breeder clients?

Dog Breeding and Genetic Testing

Though vet school curriculums have historically addressed canine inherited diseases and treatments for these conditions, much less emphasis has been placed on ...

Prevention Is Smart Breeding- Urate Bladder Stones in the Spanish Water Dog

Prevention Is Smart Breeding- Urate Bladder Stones in the Spanish Water Dog

Though reliable accounts marking the early origins of the Spanish water dog (SWD) are lost to history, likely ancestors of the SWD (and probably the Portuguese water dog) were described in the Iberian Peninsula around the 12th century. Primarily used as a herding breed, the Spanish water dog has also been trained to perform tasks for fishermen and hunters including towing boats to shore, gathering fishing nets, and retrieving game from waterways. Though still used as working dogs in modern day Spain and other countries, the demand for Spanish water dogs dropped precipitously during the industrial revolution of the late 18th and early 19th centuries when machines took over many tasks historically performed by the SWD and other breeds. This decrease in demand led to a decline in the world Spanish water dog population which still remains relatively small today.

In general, dog breeds with smaller population sizes tend to also have a smaller amount of genetic diversity within the breed. This means that any two individual dogs from a small breed population are more likely to share the exact same genetic information at any given location in their genome, including disease associated genetic mutations. This is ...