@boomerang,
They sell DNA testing kits that allow you to check your dog's breed ancestry for 3 or 4 generations back. If you're really curious about your dog's heritage, you might try one.
http://www.amazon.com/s/?ie=UTF8&keywords=dog+dna+test+kit&tag=googhydr-20&index=aps&hvadid=32871072149&hvpos=1t2&hvexid=&hvnetw=g&hvrand=8091723644815466372&hvpone=&hvptwo=&hvqmt=e&hvdev=c&ref=pd_sl_42xldmfvsh_e
Some people who own mixed breed dogs (aka mutts) like to check the DNA breed mixtures so they can be alert to potential medical problems associated with certain breeds, or the behavior/personality/temperament associated with certain breeds, while others do it out of curiosity to learn more about their dog. It can also be used to check whether a purebred dog is actually a purebred.
I'm thinking of getting a test kit to verify that my current poodle is purebred, in accord with the 4 generation pedigree I obtained from the AKC. I have some nagging concerns about the ethics of the breeder of this dog that could easily be answered by this test--my dog's ancestry should indicate only poodles for those past generations. It may finally settle the matter in my own mind, so I probably will order one.
As someone who has only owned poodles, I'm at a loss to understand the popularity of the designer mutts like labradoodles, or yorkiepoos. Why buy a dog that's only part poodle when you can have one with all the wonderful characteristics of that breed undiluted? It's unique in that it's a breed that comes in all sizes from toy to standard, virtually all solid colors, and even some mixed color patterns (called particolors, which are not allowed in the AKC show ring so they are less familiar), and it's virtually non-shedding. About the only drawback is the high maintenance of the coat. Because poodle hair grows continuously, like human hair, it must be combed and brushed constantly to avoid matting, and it needs professional grooming and a haircut about every 8 weeks or an owner who can learn to do it at home. But, as a truly devoted lover of this breed, the grooming issues are only a minor inconvenience for me given the wonderful, beautiful, highly intelligent, athletic, playful dog I get to live with.
I think the designer "doodle" dog fad will pass--I do think it's only a fad. And I would think some of these poodle mixtures might have the grooming issues of purebred poodles without the benefit of being non-shedding.
But I do think I'll get a DNA kit just to be sure I do currently own a poodle and not a "doodle" or a "poo".
I'm pretty sure I do, I'm just overly suspicious of his breeder given some things I learned about since I've gotten Toby. But, whatever his DNA turns out to be, I couldn't love him more.