Dog DNA Tests: How Accurate Are They?

At K9 Magazine we often like to play a little game. It's called, Guess The Crossbreed.

It's simple enough. We take a picture of a dog that's been added to (one of our sister websites) under the category 'Unknown Crossbreed' and have a bash at guessing which breeds have gone together to create the dog in the image.

Sometimes this game is extended to dogs where we believe they have been incorrectly labelled as a particular cross when we (or more to the point, I) think differently, says Ryan O'Meara.

I've always prided myself on my abilities in this game. In fact, until recently I had a 100% record.

Sure, you cynical types might be thinking to yourself: "How can you have a 100% record in a game where there is nobody who can actually confirm the true identity of the crossbreed?".

Well, see, in this game I get to play the role of quizmaster, contester and arbitrator of right and wrong answers. In the absence of any evidence to contradict me, I win all the time. It makes me happy.

A problem though.

Late in 2014 I found myself the proud new owner of a crossbreed of my own. A rescue dog who has lit up our lives following the passing of our beloved Labrador, Chloe.

He came as Milo but as I have a zealous opposition to dogs who's name ends in the letter 'o', (try saying the word 'No' and then adding any dog's name ending in 'O'. Poor dog will think he's constantly being told 'No'), so Milo soon became Danny.

Danny is a large black and tan dog who came to us from Black Retriever X Rescue. He's black, he's definitely an 'X' but he ain't no Retriever, but his pleading eyes and plight meant the rescue intervened to save him.

Danny was confidently labelled by the rescue as a Doberman cross Rottweiler.

As I already have two Rottweilers, Christopher and Mia, I was more than happy to agree - he's certainly got some Rottweiler in him. But Doberman? I wasn't so sure. In fact, I was downright adamant.

In my normal game of Guess The Crossbreed, I would have put forward my evidence that Danny was 'a bit houndy' and advanced it further by saying "wouldn't surprise me if he was a Rottweiler cross Greyhound'. In fact, I did do that. I did it publicly. I did it in full view of everyone on my own Facebook page.

Dog DNA Tests: How Accurate Are They?

Before you scroll to the end, what do you think the results will show? Write it down and tell us if you guessed right!

In my normal game of Guess the Crossbreed, that would have been the very end of it. I'd have declared myself right and we'd all move on. My 100% record in tact.

This, however, wasn't my normal game of Guess The Crossbreed. This was the scientific, evidence based game of Guess The Crossbreed. DNA tests were called for!

Most of us have heard of DNA and DNA tests nowadays. Regular viewers to mid-morning TV bear pit 'The Jeremy Kyle Show' in particular would have seen DNA evidence put forward to determine 'who the daddy' and end months or years of speculation within families. Now Danny was going to receive the same treatment.

The first test we did was with What Breed is my Dog (service is no longer available) and a second was with DNA-Worldwide.

The process for both tests was the same. They each sent us a DNA testing kit and the process was painless, simple and surprisingly exciting. Seriously. When you start the process you will start to feel a bit giddy with the thrill of finding out about your dog's ancestry.

Dog DNA Tests: How Accurate Are They?

With DNA-Worldwide, once you have submitted your samples, a few small swabs of saliva from inside of your dog's cheek, they set you up with access to the online admin area on their website where you can view the progress of your test.

The actual testing process for a mixed breed dog goes like this (from their site):

- We provide you with a simple home swab kit to make sending us your dog's sample easy
- We look at hundreds of unique DNA markers and compare your data to an extensive set of reference samples of known ancestry
- The computer then looks through over 8 million possible family history trees
- The detailed and easy-to-read test results and certificate will be with you in 4-6 weeks​

Thus the waiting game begins.

Sure enough, in the allotted time we received an email that Danny's tests were done and we could now compare our first and second test findings.

As mentioned, he went by his real name in the test done by What Breed is My Dog and he went by an assumed name in the test done by DNA-Worldwide. Oh yes, this DNA testing was serious business. My entire reputation as the champion of the Guess The Crosbreed was at stake.

The Results

The results from both companies were presented in a very attractive PDF document. They contain details of how the DNA test was done and, of course, the details as to what breed(s) are in your dog's family tree, as well as the history of breeds featuring in the dog's DNA.

In Danny's case the results came back both the same, even though he went by an assumed name in one of the tests.

Yes, both results were exactly the same. Precisely the same.

The entire process was a lot of fun and very informative. For generations, dog owners have often wondered the true heritage of their pets and now, with the power of DNA testing it's possible to get an answer.

(What? You were expecting me to reveal the actual results of Danny's test?)


Here goes.

Danny is, and has all along been......
a first time cross between a Rottweiler and......

...a Doberman.

Dog DNA Tests: How Accurate Are They?

My reign as champion of the Guess The Crosbreed Game is cruelly cut short and all because of a little bit of science.

If you want to find out the mysteries of your dog's heritage, go to



  1. Isnt Doberman a dierct result of Rottweiler x with Greyhound ? If that is the case then you were not that far off !

  2. I thought about this for my crossbreed – he is a rescue from Spain, and we wanted to understand some of his behaviour traits so thought if we could match him to a breed (or a few) we could help nurture those instincts. However, I wanted to know what the DNA databases are based on – and all of the ones I contacted said their pool of reference DNA is from the UK or USA kennel clubs, so it would be unlikely that the results would be useful for a dog coming from Spain. Only one company had a Spanish Mastin on their database, but as he is a small/medium dog, it is unlikely he is descendent from these.

  3. We tested (with Wisdom Panel) our rescue “whippet Labrador” as I was doubting the lab bit. It was so exciting waiting and the results were very interesting. One parent was a greyhound with an unidentifiable mix breed, and the other parent was a saluki with a dachshund. He is a big strong boy and I can easily see the greyhound saluki bits, but no-one has believed there could possibly be dachshund in there. I am so glad that you have found the tests to be accurate as I love the idea of my surprise bundle.

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