Considering that the pet-breeding industry contributes to animal overpopulation, it makes sense to adopt a "recycled" dog. Leela, 10, spent most of her life in a cage at a puppy mill as a breeding female until Wonder Dog Rescue found her a home. Photo by Lori Eanes

Monty, 7, was adopted as a puppy from Michigan's Humane Society and now lives in San Francisco. The Humane Society estimates that animal shelters admit 6 to 8 million cats and dogs each year. Photo by Lori Eanes

Lex (left), 10, was saved by Rocket Dog Rescue just one day before being euthanized at a shelter; he lives with Leela (right). Their owners use biodegradable corn-based bags to clean up after them. Photos by Lori Eanes

Stella, 1, was adopted from the San Francisco SPCA just a few weeks before these photos were taken. Photos by Lori Eanes

Instead of driving the nearly two miles to our photo shoot, Monty's owner chose to walk. Photo by Lori Eanes

Lex's favorite food is organic turkey, sweet potato and peas from By Nature. Photo by Lori Eanes