Twohorses

Twoblondeswenttothemarket.Whiletheywerethere,theyeachboughtahorse.Whentheygothome,theydiscussedhowtotelltheirhorsesapart.Theydecidedtocutthetailoffofone.Thatworkedforawhile,butsoonthetailgrewback,sotheydecidedthattheywouldbreakoneofthehorses'legs.Oneoftheblondessaid,Whichofthehorsesshouldwebreakthelegoffof,thebrownoneorthewhiteone?