if u are melee , go xp inside catacombs or dungeons , and change movement thingy of the pet to a safe spot in a rage of 600-1000. it will take xp and wont take dmg.
(use any kind of skills u have with description "provoke" . aggresion of supports-arrest-scorn from berzerkers etc. buy armor for the wolf if it is 55+ and contributes in xp already.
if u xp in the open , only change movement method in every mob , but will brake your balls a lot....