Pluto's Surprise Package (1949)

"Pluto tries to bring in the mail, but one parcel refuses to cooperate."

Pluto tries to bring in the mail, which gets more difficult when a package sprouts legs and tries to go swimming. Between the wandering turtle and the wind blowing the other mail around, Pluto's got quite a task ahead. And it's not made easier when both the letters and the turtle go off a large cliff.