Heartland Animal Hospital – Weatherford, OK | PetDx®
Early Cancer Detection for Dogs

Screen Your Dog for Cancer With a Simple Blood Draw

People get mammograms, colonoscopies, and other cancer screening tests to help detect cancer early. Now, our dogs have OncoK9, a cancer screening test developed specifically for them, ushering in a new era of preventive care for pets.

Schedule OncoK9 Appointment

Schedule Your Dog for an OncoK9 Appointment


Heartland Animal Hospital
2115 East Main Street, Weatherford, Custer County, Oklahoma, 73096, United States

Hours of Operation

8:00 AM - 5:30 PM – Mon, Tue, Thu, Fri
8:00 AM - 12:00 PM – Wed
8:00 AM - 10:00 AM – Sat
Closed – Sun

Discover the OncoK9 Test

Learn more about OncoK9 and share information about the test with others.

Download OnocoK9 PDF

Explore the OncoK9 Science

Review summaries of the peer-reviewed publications PetDx authored to introduce liquid biopsy technology to veterinary medicine and clinically validate OncoK9 in the largest canine cancer study.

View Introduction to Liquid Biopsy View CANDiD Study Summary

Use the OncoK9 Cancer SAFE Tool

Find out the recommended age to start screening your dog for cancer.

Open OncoK9 Cancer SAFE Tool

What is Cancer Screening?

Just like in people, cancer screening should be an important part of preventive care in dogs; the goal is to look for cancer when your pet is feeling well, before they start to show any clinical signs.

During wellness visits, your veterinarian may look for early signs of cancer in your dog by performing a thorough physical exam and asking you about any concerning observations. Your veterinarian may also perform routine blood and imaging tests, and may recommend OncoK9 - a new blood test that could detect cancer before your dog shows any clinical signs.

Why is Early Cancer Detection Important?

Early detection and treatment are the best ways to manage cancer in pets... cancer is frequently treatable and early diagnosis will aid your veterinarian in delivering the best care possible.

American Veterinary Medical Association

AKC.tv : Ask the Expert – Canine Cancer

Dr. Andi Flory
Chief Medical Officer and Co-Founder of PetDx

Dr. Flory joins Mike Janela to answer viewer questions about canine cancer and how a new liquid biopsy test enables veterinarians to detect cancer in dogs with a simple blood draw.

What is OncoK9?

The OncoK9 liquid biopsy test uses a simple blood draw to detect abnormal DNA released into circulation by cancer cells.

Early detection


OncoK9 may help detect cancer early, when your dog still looks healthy and has the best chance of defeating the disease.

Simple blood draw

Blood Draw

OncoK9 requires only a simple blood draw. The sample collection can take place during a routine visit to the clinic with no fasting beforehand.

Multi-cancer coverage


OncoK9 can detect 30 different types of cancer, including 8 of the most common cancers in dogs.

Cutting-edge technology


OncoK9 uses state-of-the-art next-generation sequencing (NGS) technology to detect changes in DNA that are indicative of cancer.

Clinically validated


OncoK9 was validated with the largest clinical study ever performed in veterinary cancer diagnostics.

Which Dogs May Benefit From Cancer Screening Using OncoK9?

All Dogs
Age 7 and Older

Older dogs are at higher risk of cancer, regardless of breed. Consider adding OncoK9 to their routine wellness exams.

9x Higher Risk of Cancer Over Age 7

9x Higher Risk of Cancer
Over Age 7

Younger Dogs from Breeds
at Higher Risk of Cancer

Certain breeds have a higher lifetime risk of cancer and/or have a higher risk of developing cancer earlier in life.

Dog Breeds at Higher Risk of Cancer View Recommended Screening Age by Breed

Other breeds, not shown, may also have a higher lifetime risk of cancer and/or a higher risk of developing cancer earlier in life. For supporting scientific references, please visit petdx.science/higher-cancer-risk. Recommended age to start cancer screening was calculated by subtracting two years from the median age at cancer diagnosis for dogs of that breed OncoK9 does not detect all canine cancers. Cancer types currently detectable by the test can be found in the OncoK9 MCED List. The detection rate of OncoK9 for each detectable cancer type can be found in Figure 2 of the CANDiD Study.

Find Out the Recommended Age to Start Screening Your Dog for Cancer

Please use our OncoK9 Cancer SAFE (Screening Age For Early detection) tool: cancersafe.petdx.com.

OncoK9 – Aid-in-Diagnosis

When veterinarians identify clinical signs or other clinical findings that may lead them to suspect cancer, they may choose to prescribe OncoK9 as part of their clinical workup.

Common Signs of Cancer in Dogs

If you observe any of the following signs in your dog, schedule an exam with a veterinarian.

  • Decreased or absent appetite
  • Nausea and/or vomiting
  • Unexplained weight loss
  • Difficulty breathing or shortness of breath
  • Bloating or abdominal swelling
  • Unusual odors (malodorous discharge and/or bad breath)
  • Lethargy or exercise intolerance
  • Difficulty chewing or swallowing
  • Weakness and/or collapse
  • Pale gums or tongue
  • Limping or lameness
  • Sores that do not heal
  • Bruising and/or bleeding and/or petechiation
  • Increased frequency and/or volume of urination
  • Painful and/or bloody urination
  • Changes in stool
  • Increased thirst
  • Mass(es) and/or lump(s)
  • Enlarged lymph node(s)
  • Difficulty urinating or defecating

OncoK9 – Limitations & Risks

OncoK9 requires a blood collection performed under the care of a licensed veterinarian, and test results are returned to the veterinarian for communication to the pet owner. As with any laboratory test, OncoK9 results should be interpreted by a veterinarian in the context of each patient's medical history and clinical presentation. Test failures ands false positive or false negative results may occur. To review OncoK9 disclosures, please visit the OncoK9 Test Limitations & Risks web page.