Adopt a Pre-owned Pet?

This is a bit random, but I was reading this Yahoo Finance article and the bolded portion made me laugh.

10. Pets: If you buy a puppy (or kitty) from a professional breeder or a pet store outlet, it can set you back anywhere from a few hundred dollars to several thousand dollars. On top of this, you'll need to anticipate additional fees and vet bills, too. Instead, adopt a pre-owned pet from your local animal shelter and get a new family member, fees, and vaccines at a substantially lower cost.

I wonder if we'll get class-based distinctions as we have now with automobiles. Will poodles be "pre-owned" like BMWs are today, while mutts remained "used" like a GM-produced Chevy Tracker?