Pigmen spawn with no swords
Zombie Pigmen without sword 14w05b
Zombie Pigman not holding gold swords
All mobs can not wield items.
Zombie Pigmen don't have weapon in 14w05b
Zombie Pigs don't spawn with golden swords.
Mobs spawned with /summon don`t wield any weapons or items
Can't /summon Zombie with item in 0 slot
Zombie can't hold items
Items held by zombies are invisible