Some pet buffs are permanently applied. especially on the Buff that is destroyed when a party member is knocked out of grog
https://pillarsofeternity.gamepedia.com/Pet_Party_Wide_Eff
https://mega.nz/#!zF90XKzB!86PT3YEfitilTGwE854IKc9t-P3bh_Dk_G1YInfiLKI