Pets need to be defaulted to L31 when someone enters PvP. I like to use several different pets in PvP depending on my opponents, but they are not all max level. I do not have time to level 7-10 pets to L31. I noticed if they are around L15-25, they miss a lot of attacks and arcane abilities on a L31 opponent. Or get rid of them - PvP should be about individual skill not who has the more advantageous pet.