Pet and Damage Shield Question

[GreyDuck]

Player cast damage shield damage is "neutral", meaning that if a player does not do at least one damage, the mob poofs (no one gets credit for the kill).

My question is, does pet DS damage count similarly (either player cast or pet self cast)?

If a mage has to do 50% damage to get full XP, are they competing against damage dealt by the pet (Hits and casting) or damage done by pet and DS?