Pet Focus is a focus effect found on certain items. Pet focus only works for the pets of the following classes Magician , Beastlord , Necromancer . The pet focus does not provide the usual focus effect message like other spell effects; the focus effect is only factored the precise moment when you summon a pet from a spell. Once a pet is summoned, having a pet focus equiped or not makes no difference. Your only reliable means to determine if your pet is focused or not is to send it into combat and compare the before/after performance.