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World’s Oldest Cancer Dates Back 11,000 Years -- To Dogs


World’s Oldest Cancer Dates Back 11,000 Years

In the great majority of cases, cancer isn’t contagious. Most cancers remain in the individual human or animal body that has become afflicted with them. However, researchers have tracked one specific strain of cancer that spreads itself from dog to dog during the mating process, and what they’ve discovered is sort of astounding. According to research, this sexually-transmitted cancer goes back about 11,000 years, making it the oldest line of cancer cells ever discovered. Canine transmissible venereal tumor, the specific name for the cancer, is one of just two strains of cancer that can be spread from one animal to another. Researchers were able to track this cancer’s jumps through the generations by analyzing a particular mutation of the cancer cells. Because all dogs trace back to just one small collection of animals, researchers can use present-day genetic information to generate theories on the past. The cancer was traced back to one individual dog that lived 11,000 years ago, though cancerous mutations make it impossible to tell the gender of the pup. Researchers hypothesize that because the original dogs had such low genetic diversity (likely due to being trapped in an isolated population), it was easier for the cancer to evolve and change to find the best possible method of transmission. There is no similar cancer known to science that affects humans; sexually-transmitted cancer is unique to dogs thanks to their vast genetic similarities and extended inbreeding.     About the Author: Craig Davis is Founder and CEO of Vet Organics, a company which produces effective and safe natural remedies for dogs and cats.

Craig Davis

Craig is an entrepreneur and business executive with an extensive background in all aspects of small business management. As a long-time dog advocate and guardian, he founded Vet Organics to develop an affordable, all-natural, safe, and effective dog ear infection remedy. With the help of natural chemists and botanical experts, Vet Organics products have helped thousands of dogs around the world find relief for painful, chronic ear infections. Craig went on to design powerful all-natural formulas that address a variety of dog and cat ailments, health-boosting supplements, and nutritious treats. When he isn’t designing solutions for dog and cat well-being, he can be found mentoring young entrepreneurs in his community, traveling the world, or building other businesses with an ethical and sustainable focus.

What Customers Are Saying


EcoEars by Vet Organics fixed our girl's ears in the first couple of days & she was a whole new, happy dog again. THANK YOU Vet Organics!!!*

Nikki Wiedmer


EcoEars is a great product! I used it in my Lacey's ears and we haven't had any problems since.

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Thank you for the peace of mind that my dog is not in discomfort anymore, thank you for this product being organic and good for our dog's ears, and seriously thank you for giving us an...

Melissa Block Demant


I used this product for my Boston last summer. Worked awesome. In 2 days, I've seen a improvement. Within 4 days, the infection was gone. My pit bull started having an issue with his...

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This stuff really works--after spending money at the vet @ $25 a bottle, it's saving me a lot of money.

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*Results may vary based on factors such as age, size and physical condition of your pet.