I personally wouldn't waste $$ on DNA tests, but I suppose some people have it to toss away (I do not) and figure what the heck, let's see what comes back, nothing to lose. You can tell so much once the pup starts to grow up a bit, grow into it's body, develop an actual personality (besides just cute in general

), and start to show some of it's breed traits. Fifteen years ago (yeah, I know, showing my age, huh?

), I rescued a very pregnant female - chased her thru many lanes of LA traffic, finally caught up with her, no collar, horrible condition, etc - got her home, and 10 days later she had 11 puppies in my bathroom. She was a large Beagle mix - we always thought Beagle/GS (if you can imagine that one - cute actually, and around 50lbs). The puppies all looked like little Rottie puppies, little solid black balls. As time wore on, they got lighter and lighter, some developed the saddle like the mom, others a very muted saddle - but we were sure "dad" had to be a Golden or a Golden/Lab. I sent them all to homes (except two that I kept) by 7 wks old (please, don't anyone tell me I should have kept them longer, I was about to pull my hair out!! I went from a quiet 2 dog household, to suddenly having 14!! .. and yes, I found a home for the mom too) as little black dogs with hints of color and within the next 4 months, they were turning much lighter. My vet did "shot clinics" at my house (he did house calls) til their puppy shots were finished and the puppies would all come (it was so fun!) and it was so funny to see these formerly black dogs not looking anything like their former selves. I barely recognized them any more!!
And - a couple years after that, I was walking down my street when my neighbors were just getting out of their car, and out tumbled a little 8 wk old puppy. My remark: OMD, you just got a new GS puppy!!!

Oh no, they say, they just came from the pound - and it's a little terrier puppy. HUH? I said well, I've certainly been wrong before, and could be now - but it sure looks like a GS to me!! Oooooh NOOOO, they wanted a little terrier puppy, and the pound told them this was a terrier puppy!! They did not want a GS, only a little dog, and the shelter assured them this was a little dog!! Ok. Well, it ended up being a pure GS - and I helped them rehome her a few years later (I'd have taken her - but had 4 dogs, my orig two plus 2 of the 'puppies' so unfortunately couldn't take sweet Josie, too). Terrier? I think not.
So - moral of this story - give your puppy a chance to "see what he's gonna be when he grows up". He just might tell you.
