You can check out their entire description on their official site.

Happy Friday! The life of a dungeon-clearing warrior can be a lonely one. Friends in your party may not be online, or may be questing abroad. To whom can a solitary skeleton-smasher turn for morale support? Fear not! Fluffy companions await you, whose inventories are surpassed only by their loyalty. Oh, and pointy teeth. Or claws. In this Friday Treat, we introduce you to the pets of Torchlight II, some old friends and new.

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