It's a Bear (1919)

As an entomologist and all-around wimp, Orlando Winthrop gets little respect from his wealthy parents. But when business needs to be taken care at the Winthrop sheep ranches out West, Orlando is raring to go. Upon his arrival, the ranchers see Orlando as an easy mark, but it turns out they're wrong. They try to take Orlando's money in a poker game -- and wind up broke themselves.