The Lineup: A big sister, a little sister, and a horse from "Ostwind (German for Windstorm)".
Fart Factor: A coltish 8 out of 10. Big sis thinks she knows who did it. Lil' sis thinks she knows who did it. And the horse just wants an apple.
Most Likely Fart Suspect: The little sister dropped a megabomb that made the horse rear and buck.