Michelle makes $221 selling lemonade to construction workers on an unseasonably hot day, and when Kimmy goes with her to the candy store to spend her money, she gets sidetracked and ends up buying a donkey (whom she names Shorty) at a petting zoo instead. Causing much trouble amongst the family, such as D.J.'s allergic reaction to Shorty, with her senior pictures the next day, its constant braying during the night, destroying a valuable photo of one of Danny's ancestors and wrecking Stephanie's homework. Everyone likes Becky's idea of donating Shorty to the children's zoo. Jesse tries to sing the Three's Company theme song, but keeps getting some of the lyrics wrong until the family helps him out at the end.