There's a really interesting question about incentivization behind this. Everybody knows that there are too many dogs, and as a result many die in shelters because they aren't adopted. Yet many folks continue to buy dogs from breeders, particularly in America where they actually sell dogs in stores!

So what is the best solution so that exactly the right amount of dogs exist and none are killed. This is innovative, but I suspect training doesn't scale. Perhaps make it illegal to sell dogs until we're out of strays? Maybe a tax deduction for adopting a dog, or a tax penalty on buying a dog? Or an anti-breeding campaign (like the anti-fur one which has been very successful)?

I'd love to hear some cool ideas here.