Pigs: WoW Battle Pets
Select a pet:

World Event: Children's Week
Quest: A Warden of the Alliance/Horde [10]
Vendor: Jepetto Joybuzz, Leial Knitterton (H), Brundia Braidhammer (A)
Zone: Dornogal, Orgrimmar (H), Stormwind City (A)
TIP: You can search for a specific pet using any word found in the pet's name or item. You can also search using obvious keywords like "robot," which will return all robot-like pets.