Why the Dwarves Devoured Bilbo's Food?

An interesting fan theory about the Hobbit movie proposes that at Gandalf's suggestion, the Dwarves consumed all of Bilbo's food to ensure it wouldn't expire and go to waste while he was gone on their adventure. Although lacking concrete evidence, it seems unlikely that all 13 Dwarves were simply rude and demanding upon their arrival, considering their initial promise to be "at his service." Instead, Gandalf might have orchestrated this to encourage Bilbo to embrace the journey, knowing it's easier to leave home when there's no food left in the pantry.