Holly Madison Featured on 'Adopt, Don't Shop' Billboard (Photos)

Playboy modelpictured with Duke and chefshown with Stella Blueteamed up to support a cause that they both want elevated. They hope to get the word out that people should adopt a pet in order to put the puppy mill industry out of business.

They have teamed up with Last Chance For Animals, a national non profit organization dedicated to eliminating animal exploitation.

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Photos: WENN