Cursing is a feature on Marapets where you can curse a pet using a Voodoo doll, however, the doll must be the exact species of the pet you are trying to curse or it will not work! (Ex. Trying to use a Crindol Voodoo Doll on a Chibs will not work!) The only way to negate curses from a pet is to pay the Witch Doctor in Eleka Castle (the same place where you can get Voodoo Dolls, eek!) 25RP to protect it for an entire week.