By frederique wacquier / Getty Images Foie gras pate, the consummate delicacy of French holiday tables, might be harder to find this year and certainly pricier due to a bird flu outbreak that ravaged farms across the west and south last winter. Foie gras pate, the consummate delicacy of French holiday tables, might be harder to find this year and certainly pricier due to a bird flu outbreak that ravaged farms across the west and south last winter. After millions of ducks and geese were culled to halt the epidemic, some farmers say they are having to take an unprecedented step — using females …