Pet Weapons and Secret Pet Weapons?

[DLev45]

Is there a damage bonus benefit that comes simply from dual wielding?

In other words, if I give my level 29 fire pet two level 1 summoned daggers, making him dual wield, but not adding the weapon dmg because the weps are too low, will he do more damage by virtue of dual wielding than he would have done had I done nothing at all?