Originally Posted by
schwank05
The trick to leveling Is go into Valley of the 4 Winds, get a beast pet to high level 20+ I actually use either my Kun-lai Runt which is Humanoid or my Mechanical Kitty, Attack critter pets, team will usually consist of 2-3 critters and an aquatic. Then put out your level 1 pet and attack once, he may die a time or 2 but if they heal or something you just swap to your beast and kill the whole team after first fight your pet will be lvl 5, second level 9-10, and after 3rd 13 you get the picture. This is how I level all my pets or in the Vale with a Flying against a water pet.
Additionally if you complete the 40 Tamer achieve you get a hat that gives +10% exp to pet's.