Your pet gains experience from playing pet training games in the Pet Pavilion.
You need Energy to play pet training games. The Energy globe is next to your Health and Mana globes. You can also see your Energy by pressing C to look at your character in the Spellbook.
Your Energy governs how often you may train your pet. It returns over time, but if you need more Energy and cannot abide, you may purchase an Energy Elixir from the Crown Shop. If you don't train your pet, it won't grow up, so it's very important to pay attention to your pet and train it as much as you can.
Right pets if they leveled to fast the pet races would be over whelmed with epic pets. I love the fact that we need to find their favorite foods for example , my pale maiden loves goat cheese which gives her 6 extra points after each game :) food she likes gives 4 extra
It doesn't take as long as you might think. In the time the test realm has been opened, I have train 1 pet from teen to adult, 1 from baby to adult, and 2 more from baby to teen. It is just a matter of finding the right food for them and then it goes faster.
Well i really do agree training pets is hard. I believe that they should level up when we battle because sometimes we don't have time to level up our pets because we want to do missions to level up or to help our friends in time of need. I tried to level up my pet i just stop trying because it took to long. I'm sad because i really wanted the strong cards the pets gave