 Windfall was bred a little during his time in Germany, until he began his event career.During this time, he produced some promising prospects, including his son Hunnenkoenig, daughter Karisma, who was named a Premium mare by the Verband, and son Karambeau M, who was the South German Young Horse Eventing Champion.During his first year in the United States, Windfall sired 9 foals, and produced 17 foals in 2002, all by fresh cooled semen.