As a side note regarding mutts, while mutt puppies are definately a crapshoot... any puppy is. You may have a better idea of size, temperament, etc. if you go to a breeder... but then again, if you go to a CRAPPY breeder, you still don't really know. My dog came from a very lousy breeder, and is way too big for the standard, doesn't even look purebred, has a horrid temperament, and just about every health issue on the face of the planet.
See this is why you shouldn't buy from breeders who don't do health and temperment testing on the parents..and have the paperwork readily avaliable for the potential buyer.
If you take 2 dogs that have been tested with "Excellent" or "good" rated hips...9 times out of 10 you will get a litter each time that produces either "good" or "excellent" rated hips. (the other ratings are "ok" "poor" "bad")
This goes for all genetic problems in each breed.
Generally it is recommended that you go back 2 generations. Checking both grandparents and parents. If a breeder doesn't provide this documentation..it's simple...don't buy their dogs. You could be buying a ticking timebomb. (of course this makes the buyer do research before buying..meaning they will have to research the breed to know what genetic problems should have been tested for in the breed they wish to buy. Which is why BYB dont' do this testing..they know most people are too lazy to research before buying.)
Having this documentation can and does provide you with a feeling of security. Most dogs who come with such documentation also come with a 1-2 yr health guarantee..meaning if they come down with a genetic problem, that was tested for and found clean in the pedigree, they will either replace the dog or refund your $$.
It's not a "iffy" situation unless you make it one by not requesting/requiring said documentation, imho.
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I stand by my earlier comments in another thread. I think breeder's should have to be:
1. Be both Federally and State licensed,
2. The breeding facilities should be periodically health inspected,
3. Breeders should be forced to obtain business licensing (just like anyone else selling a product to the public) to sell puppies (or kittens). Which would require the yearly purchase of business licenses and pay business taxes, and
4. Be registered with the BBB, so that others can look at their complaint history (if any exists).