Mage Pet Questions

[Honest]

Had a few questions on mage pets.

Does the Damage shield on the fire pet count as pet damage?

At what level do pets dual wield two large 1 handed weapons, at lvl 25 right now he can only care a spear and a dagger?

Does anyone know if weapon delay effects pets? The wiki states that attack delay of pets is not affected by weapons.

Duoing with any other class will negate the pet exp penalty?

Thank you!