Soap box time!! -- I walk dogs at a local shelter. There is not a common breed that doesn't find it's way through our doors at some point during the year. Sure, you might not end up with a "certified" purebred that's going to win a dog show (do you really want one of those for your family anyway?), but with almost certainty, I can guarantee that you can find what you're looking for at a local shelter. There is almost…
I'm not sure. Our local shelters are dominated by 2 breeds: pit bulls and chihuahuas. I would say it's over 75% of the dogs here. In fact, I heard our shelter was bringing in dogs/breeds from other cities because no one wants the dogs brought in locally.
Also, I have reservations (maybe unwarranted) about bringing a shelter dog into a home with small kids (I have 3 and one has already been bitten by a dog). I'd much rather start with a puppy (which, again, I don't see a lot of in our shelters other than the breeds mentioned above).