The DNA testing of dogs to tell you what breeds it contains is a SCAM.
no, not. Read the research on it. I myself have sent a number of known samples to several different companies and gotten very reliable results. There is a slight possibility they can mix your sample up with someone else’s sample.
The problem is people don’t interpret the results of these tests properly.
People frequently think “mutts” are descended from “purebreds” but it’s not true. “Purebreds” are all descended from mutts; the concept of a “pure breed” is quite a new one; and many, possibly most, mutts have no purebreds in their ancestry at all, and quite a few lines of “purebreds” have had relatively recent infusions of non-purebred DNA via accidents and who knows what else.
What usually happens is you get a cute dog from the shelter and everyone guesses it’s a “boxer-collie-lab-corgi” mix or whatever, and you get the results back from the company listing ten different highly improbable breeds as “possible ancestors” or “contributing DNA” and so you say how silly, it must be wrong.
What it actually means is you have a “purebred mutt” on your hands. Let’s say it says that the “golden retriever” is a contributor in your dogs mix. This doesn’t mean your dog is necessarily a golden retriever mix- what it means is that one of the dogs that was an ancestor in the lines leading to current golden retrievers is also an ancestor of your dog.
Well, the golden retriever as a breed was only invented in the late 1800’s in Scotland by crossing some retriever-types with some local spaniel-types, inbreeding the result and adding in a few other doses of genetics here and there like setters and even a type of hound. So YOUR dog could be descended from any one of the dogs that were also used to produce the golden retriever, thus you see a genetic link to the golden retriever. Or, possibly, way back when, one of the early golden retrievers was an actual ancestor of your dog.
You can see if you send in a purebred sample, they will be likely to pick up “contributors” to the breed’s development and make you angry that either the test isn’t accurate or your dog isn’t actually a “purebred”. Well, all purebreds are descended from mutts, and it wasn’t that long ago that there really weren’t any purebreds. Very few of our current “purebreeds” existed prior to the 1800’s.
some of the more reputable DNA companies are now offering tests to identify purebreds. I would guess they’ve tweaked how they interpret the results so they can leave out the “contributors” in the tests designed to identify purebreds.