Stars And Their Pets: America's Cool BuddyFerrera pounds the pavement with her pooch in New York. Plus: Sissy Spacek shops Malibu, Calif., with her dog and daughter, and more

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ADRIAN GRENIER

After saying goodbye to his onscreen pooch, the Entourage actor keeps company with his own canine companion while running errands in Los Feilz, Calif., Saturday.