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I got my dog's DNA tested and what I learned shocked me

This is Izzie. When I adopted her over a decade ago, I was told she was a mixed-breed Golden Retriever. She was only a year old, so no one knew how big she'd get (most Goldens reach their full size, about 60 lbs, around age 2) or how she'd behave in a house where she was the only pet. Our veterinarian told us she looked like a Golden, so it was safe to say she was some kind of (smallish) Golden Retriever mutt.

I got my dog's DNA tested and what I learned shocked me

Despite our worries, she stayed roughly the same size. And we stayed curious about her heritage. She's now 14 years old, and she's friendly and loyal. Most people get dog DNA tests so they can find out what kind of behavioral traits to expect: Golden Retrievers tend to be loyal and good with kids, for example, while Dalmatians are super active and generally make good guard dogs.

Despite our worries, she stayed roughly the same size. And we stayed curious about her heritage. She

When I got the chance to test her DNA, I seized it. There were several options to choose from, but I picked the Wisdom Panel DNA test developed by MARS Veterinary, the world's largest pet healthcare provider. At $84.99, the kit wasn't cheap.

When I got the chance to test her DNA, I seized it. There were several options to choose from, but I picked the Wisdom Panel DNA test developed by MARS Veterinary, the world

Inside, I found two cheek swabs along with a set of simple directions.

Inside, I found two cheek swabs along with a set of simple directions.

Source: Current Biology, 2015

The side of the box was labeled with a Sample ID so that I could register her test online.

The side of the box was labeled with a Sample ID so that I could register her test online.

Getting dog DNA samples is a lot like getting human DNA samples — you firmly twirl it along the inside of each cheek for 15 seconds, and then repeat with the second swab.

Getting dog DNA samples is a lot like getting human DNA samples — you firmly twirl it along the inside of each cheek for 15 seconds, and then repeat with the second swab.

Source: Business Insider, 2015

Izzie wasn't a huge fan of the process. But my dad (in the background) got a kick out of watching us.

Izzie wasn

Once I got Izzie's samples, I stuck the swabs into the holes in the package and let them dry, as instructed, for 5 minutes. There's tons of microscopic Izzie DNA on there!

Once I got Izzie

Once the swabs were dry, I resealed them, packed them back up, and popped it in the mail. Once it got to Wisdom Panel's lab, Izzie's DNA would be scanned and analyzed in a database of 250 dog breeds for 1,800 different "markers," or places in Izzie's DNA where there are signature variations, which can be used to determine what breeds she's most likely made up of. The test also looks for coyote and grey wolf markers. Coyotes, wolves, and domestic dogs can interbreed (they're all members of the same species, Canis) but they belong to distinct subspecies.

Once the swabs were dry, I resealed them, packed them back up, and popped it in the mail. Once it got to Wisdom Panel

Before I get to the results, I want you to guess: What do you think Izzie is?

Before I get to the results, I want you to guess: What do you think Izzie is?

I have to admit: I was completely surprised. After 2 weeks, I got an email telling me Izzie's results were ready, so I logged on to WisdomPanel.com and entered my information. Here's the first screen I saw:

I have to admit: I was completely surprised. After 2 weeks, I got an email telling me Izzie

Chow Chow and Cocker Spaniel?! American Eskimo and Samoyed?! So much for my "Mini Golden Retriever" assumption...

Chow Chow and Cocker Spaniel?! American Eskimo and Samoyed?! So much for my "Mini Golden Retriever" assumption...

At first, I couldn't believe it. She doesn't look like a Cocker Spaniel, even though her results say she's nearly 38% Cocker. But I kept clicking through the results, which appeared on several pages, as shown below:

At first, I couldn

While she doesn't look like a Cocker Spaniel, her personality certainly fits. Cockers are known for being members an active "sporting breed." They thrive on daily exercise, and they're intelligent, gentle, and do well as part of a family.?

While she doesn

Onto the next part of her DNA: 25% Chow Chow. To me at least, Izzie doesn't look like a Chow Chow either. Still, a few personality traits sounded somewhat familiar:

Onto the next part of her DNA: 25% Chow Chow. To me at least, Izzie doesn

Here's the screen that got me: Izzie is 12.5% American Eskimo Dog. With the exception of the perky ears and the white, super-fluffy coat, Izzie does kind of look like an American Eskimo! I can see some Izzie likenesses in this dog's eyes and snout, for example:

Here

The last specific breed in her results was Samoyed, a type of dog initially named after a group of nomadic Siberian reindeer herders who bred the dogs to help round up reindeer and pull sleds. This dog's tail looks a lot more like Izzie's than the other breeds, and its eyes and snout are similar too:

The last specific breed in her results was Samoyed, a type of dog initially named after a group of nomadic Siberian reindeer herders who bred the dogs to help round up reindeer and pull sleds. This dog

Her final page of results looked at all the remaining DNA that couldn't necessarily be classified into the previous groups. The breeds shown below probably reflect some breeding that happened outside of the three generations that Wisdom Panel tests for. Here are the groups that Izzie is most likely — statistically speaking — to be related to, with the most likely at the top:

Her final page of results looked at all the remaining DNA that couldn

No coyote or wolf DNA for Izzie!

No coyote or wolf DNA for Izzie!

Still, it's important to keep in mind that the difference among breeds is unusual as far as mammals go. All dogs are still a member of a single species — Canis lupus familiaris, aka the domestic dog. But thanks to having been bred for so many years for specific characteristics by people, they have some pretty big visual differences.

Still, it

And Izzie, with her mix of Cocker Spaniel, Chow Chow, American Eskimo, and Samoyed traits, is certainly unique! She's loyal and friendly, but wary of strangers. She's small in stature but big in personality, and she is gentle and loving, despite her occasional bark.

And Izzie, with her mix of Cocker Spaniel, Chow Chow, American Eskimo, and Samoyed traits, is certainly unique! She

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