Stars and Their Pets: Carrie Underwood's Cuddly Co-HostUnderwood takes on morning TV with a pint-sized pup in New York. Plus: Jake Gyllenhaal hits the dog park and more

JAKE GYLLENHAAL

Who's scruffier? Tough to say whether it's the actor or his German shepherd Atticus, who walks leash-less to a Los Angeles dog park on Sunday.