Without Time or Reason (1962)

Percy, a meek little guy, goes to a jewelry shop to have his watch fixed. Crooked jeweler Ralph smashes the watch with a hammer, telling Percy that it's out of style. He then proceeds to sell Percy a cuckoo clock with a little dead bird, which Percy replaces with a baby eagle (feeding it super eagle food). Percy goes away, and when the eagle begins to grow, it's too much for him. He returns the clock, and he and the eagle attack Ralph.