In April 2008, Lisa Ling went undercover to reveal what goes on in puppy mills—and the world was outraged to see thousands of female dogs and puppies endure horrific conditions, abuse and nonexistent veterinary care.

That show increased awareness and spurred action. House Bill 2525, a bill to tighten regulations and stop inhumane treatment at large dog-breeding facilities, passed the Pennsylvania Legislature on October 8, 2008.

Now, San Francisco is considering some groundbreaking legislation with a bill that would ban the sale of all animals in stores, with the exception of fish. "It would be the first city to do that if they go through with it," Lisa says.

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