Amanda Hearst — after going on a puppy mill raid in Mississippi — has recruited a group of her animal-loving pals such as Dylan Lauren, Georgina Bloomberg, Kick Kennedy, Samantha Kleier Forbes and ABT star Marcelo Gomes to create “The Friends of Finn.” Amanda, who bought the half-Chihuahua/half-dachshund from a pet store, was unaware Finn was a puppy-mill pup. To change the game, she and her mother, Anne Hearst McInerney, are chairing the Humane Society’s Make History Now Gala at the Pierre on Sept. 22, raising money to stop the cruel overbreeders.