Having made a considerable amount of money with her lemonade stand, Michelle (the Olsen twins) blows the whole wad when she makes a "little" purchase at a travelling petting zoo. Now the Tanner household is stuck with the care and feeding of a cantankerous donkey named Shorty. Curiously, the plot is resolved with a spirited family rendition of the theme song from Three's Company. ~ Hal Erickson, Rovi