ok heheh - i've got an answer for that too - the preds that go on the hunt for their 'rites of passage' are not allowed to hunt the aliens with acid proof armour or be equiped with full weaponry, originally the preds were meant to have controlled the breeding of the queen so only a set amount of aliens were born, thus having none of the more powerfull weapons the preds could prove themselves to the elders and become 'blooded' hunters. when the preds go from world to world to hunt the HIVES they go down fully armoured with full weaponry. phew, my brain is fried.