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In page High Sierra (film):

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Bogart's character's dog, "Pard," was erroneously believed by some to be canine actor "Terry" ("Toto" from The Wizard of Oz). In fact, it is Bogart's own dog, Zero. In the final scene, Buster Wiles, a stunt performer, plays Roy's corpse. His hand is filled with biscuits to encourage Pard to lick Roy's hand.[4]