Rat Ogres are big, tough creatures and their Packmasters will instinctively shelter behind their enduring bulk.
When an enemy unit shoots at a unit of Rat Ogres that also contains one or more Packmasters, the enemy player must roll a D6 for each successful roll To Hit before making any rolls To Wound. On a roll of 1-4, the hit is inflicted upon a Rat Ogre. In combat, enemy models must allocate their attacks against a model they are in base contact with (or against the closest model if they are within the fighting rank but not in base contact) before rolling To Hit.