Because people put way more value on animals than need be.
Owning a purebred dog is better, especially for a family. I say this only because it is easier to know the temperament of the dog. If you know the breed, then you have a better idea of how it acts and what it needs.
It can be a much more difficult to understand a mixed dog.
That being said, I think a mixed pound puppy can be very ideal. My good friend has one, and she is an incredible animal.
This post was edited on 4/18 at 11:23 am