I know I am way late to this party but, I would totally fight the 100 duck sized horses, and where shin guards. Then I could just let them rail against the shin guards until they dropped from exhaustion, there by winning the fight. Afterwards I could give them all water and pet them until they were rested, at which point I would have an army of 100 tiny horse friends. The next guy would then have to choose between fighting a horse sized duck or 100 horse sized ducks and me. :-)

Cheers,
@kellyjanderson