Pigs in a Polka is a 1943 Warner Bros. Merrie Melodies cartoon series directed by Friz Freleng.
It is also part of a light-hearted, culturally subversive Merrie Melodies running joke, which would later be re-emphasized with another Fantasia parody, 1943's A Corny Concerto.
The first pig, using a prefabricated home kit, erects a wire structure, then quickly covers it with straw.
The wolf arrives dressed as a gypsy, and sets about, through dance, trying to lure the first two pigs into a position to be captured.
The wolf attempts to bash in the front door, then resorts to huffing and puffing to blow the house down (to which the pigs respond by offering Lusterine mouthwash), but he fails.
Fast-paced music begins and the wolf dances to it, resulting in him being exposed when his costume falls off piece-by-piece.
From the obligatory scene-setting rigamarole of the three pigs slapping together their three separate houses of straw, matchsticks and bricks, it's abundantly clear that Friz means to reapply the same tweaked synchronization of classical music to animated action that he achieved in the Franz Liszt-driven Rhapsody in Rivets (1941).
This is one of the 61 pre-1948 WB cartoons to fall into the public domain as United Artists did not renew the copyright in time.