How can I get more pet slots?

Besides the one we're working toward in the event going on rn, you buy pet slots for 2000 CSC from the Pet Page :)

What event? o_O

Basically there is a site wide event going on, everyone is working towards 500,000 quests. If you do some quests from Friday thru Thursday then you will get a free pet slot along with everyone else who takes part. That is if we reach the goal of 500,000 total quests complete.

Oh awesome! I do quests as much as I can C: Thank you for the info!