Cracked Quack (1952)

Seeking refuge from a fierce snowstorm, Daffy Duck slips into Porky Pig's warm house without being noticed. His plan is to quietly freeload off Porky all winter long. However, Porky's dog quickly catches on that Daffy is no mere stuffed decoration, as he's pretending to be, and repeatedly attempts to warn Porky about the duck's deception.