Deep Dive into Utilizing Genetic Testing

ImmunityQ&AMeongsiljang Veterinary Advisory Board

Canine genetic testing is a preventive tool that helps you understand breed-specific genetic disease risks, drug response tendencies, and personalized health management strategies in advance. Here’s a summary of when to test, how to interpret the results, and key points for using them effectively.

What Is Canine Genetic Testing?

A veterinarian collecting a DNA sample from a puppy using an oral swab.

A canine genetic test is a preventive medicine tool that analyzes your dog’s DNA to provide early insights into breed-specific genetic disease risks, drug responsiveness, and tailored health management strategies. The key benefit is early detection. By identifying genetic risks before symptoms appear, you can customize your dog’s diet, exercise routine, and regular check-up schedule. For mixed-breed dogs, the test can also reveal which breed lineages are present, allowing you to create a health care plan suited to their unique genetic makeup.

Why Should You Get Genetic Testing?

Purebred dogs are often known to have a predisposition to certain genetic diseases. However, the prevalence of specific conditions can vary by region and population, so it’s important to interpret these tendencies cautiously, keeping in mind that individual differences can be significant even within the same breed. Genetic testing is used in certain breeds to assess the risk of developing specific hereditary conditions or to identify carrier status for issues such as collie eye anomaly (CEA), hereditary skin disorders, and autoimmune or immunodeficiency-related diseases. That said, no single test can reveal all potential risks, so results should be interpreted in conjunction with physical examinations and clinical findings. It’s best to consult your veterinarian to safely adjust medication, anesthesia, and health screening plans based on a comprehensive evaluation.

Comparison of Genetic Test Types

Item	Breed identification test	Disease screening test	Drug responsiveness test
Purpose	Confirm lineage and breed proportions	Confirm genetic disease carrier status and disease risk	Confirm risk of side effects from specific drugs
Recommended for	All mixed-breed dogs	Purebred dogs and dogs planned for breeding	Dogs scheduled for surgery or long-term medication
Sample collection	Oral swab	Oral swab or blood	Oral swab or blood
Testing time point	After weaning is complete, after 6 weeks of age	After weaning is complete, after 6 weeks of age	Anytime before surgery or medication
Result turnaround	2–4 weeks	2–6 weeks	1–3 weeks

Oral swabs should be collected after weaning is complete and after 6 weeks of age, whereas blood samples can be collected regardless of age. The turnaround time and cost vary depending on the testing lab and the panel of items.

How to Interpret Test Results

Results are typically reported in three categories: - Clear: No gene mutation detected. - Carrier: The pet carries the gene but has a low risk of developing the disease; caution is advised when breeding. - At Risk/Affected: High risk of developing the disease; early management is necessary. However, an "At Risk" result does not guarantee the disease will occur, as environmental factors, diet, and exercise also play a role. Always review the results with your veterinarian to create a proper management plan.

A pet owner reviewing their dog’s genetic test results.

Do Not Blindly Trust Test Results

Genetic testing is a tool that shows the probability of risk, not a diagnostic report that predicts disease onset with 100% certainty. A "high risk" result does not mean your pet will definitely develop the disease, and a "normal" result does not guarantee they will never develop it. It should be used in conjunction with regular health check-ups, physical examinations, and blood tests for a comprehensive assessment. Do not start excessive treatments out of anxiety; always consult with your veterinarian.

How to Apply Test Results to Daily Life

Test results are only meaningful when they translate into specific care actions. - Dietary adjustments: If a risk for a specific organ disease is identified, consult your veterinarian to determine an appropriate dietary management plan. - Exercise moderation: For breeds predisposed to joint or orthopedic conditions, it helps to reduce strenuous activities such as jumping or climbing stairs. - Adjusting check-up intervals: If the risk for certain diseases is high, it is advisable to shorten the interval between routine health check-ups and include necessary imaging and blood tests. - Medication and anesthesia precautions: If genetic variants related to drug responsiveness are present, be sure to inform your veterinarian before administering any medication or anesthesia. It is helpful to have these test results recorded in your pet’s hospital chart.

A personalized diet and care plan tailored to your pet's genetic test results.

Key Points to Check Before Testing

- Testing facility credibility: Verify the accuracy of the testing procedures and the laboratory’s reputation and customer support standards. Ensure the lab is backed by veterinary science and has a comprehensive database of breed and disease information. - Scope of testing items: While some low-cost tests only check breed, a panel that covers a broad range of genetic conditions is more beneficial if your goal is genetic disease screening. - Timing of sample collection: Oral swabs should be collected after the puppy is at least six weeks old and has finished weaning, as the mother’s DNA may contaminate the sample during nursing. If age restrictions are a concern, blood samples can be collected regardless of age. - Veterinarian consultation support: Confirm in advance whether a veterinarian is available to help interpret the results.

Cases Where Testing Priority Is High

- Purebred dogs planned for breeding: Confirm whether they are carriers of hereditary diseases before making breeding plans. - Dogs scheduled for surgery or long-term medication: Genetic testing for drug metabolism sensitivity is especially recommended before anesthesia. - Adopted mixed-breed dogs: Without known lineage, it is difficult to predict prevalent diseases. - Recurring specific symptoms: If itching, digestive issues, or joint pain recur without a clear cause, genetic factors should be considered.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

When is the best time to have a dog undergo genetic testing?

Oral swabs can be taken after weaning, starting at 6 weeks of age, while blood samples can be collected regardless of age. For dogs planned for breeding, testing should be done before mating; for mixed-breed dogs, it is best to test right after adoption; and for dogs scheduled for surgery, testing should be completed beforehand. Since DNA remains unchanged throughout a dog’s life, testing can be done at any age.

Is it accurate to use a home test kit?

While DNA can be collected using oral swabs, it’s important to remember that genetic testing is not 100% perfect. The accuracy of the test and the reliability of the laboratory significantly influence the quality of the results, so be sure to choose a reputable testing facility. For sample collection, wait until the dog has finished eating and is separated from the mother, and ensure the mouth is clean before carefully scraping the inside of the cheeks with the swab. Always have a veterinarian help you interpret the results.

The test results came back as “high risk.” Should I start giving my pet medication right away?

No. A "high risk" assessment doesn't mean the disease has already developed; it simply indicates a higher likelihood of occurrence. The standard approach is to consult with your veterinarian and begin preventive measures, such as shortening the interval between regular check-ups, adjusting your pet's diet, and managing their exercise routine.

Does genetic testing have meaning for mixed-breed dogs?

Yes, it can actually be even more helpful. Knowing which breeds are mixed in a dog of unknown lineage allows you to prepare for the health conditions commonly associated with those breeds. I recommend a comprehensive testing package that combines breed identification with disease screening.

How much does it cost?

The cost varies significantly depending on the specific tests and the laboratory. Options range from basic tests that simply confirm breed to comprehensive panels that screen for hundreds of genetic diseases. To ensure you choose the right level of testing, discuss your goals with your veterinarian and select the appropriate scope for your pet’s needs.