First, players that purchased the Digital Deluxe Edition of MoP will receive the Lucky Quilen Cub (now live) and mount upon logging in after patching.
In addition, toy vendors in Stormwind, Orgrimmar and Dalaran now sell the Warbot and both red and blue fuel! The pet costs 400 gold while the fuel costs 20 silver.
Lastly, the Fox Kit is not only a rare drop from the foxes on Tol Barad Peninsula, now it can also be purchased from the Tol Barad Peninsula quartermasters for 200 commendations. You must be exalted with either faction to purchase this pet.
New Pet Journal
The spellbook companion tab was replaced by the Pet Journal. This new UI provides greater utility with pet stats, sources, previews, and even unique descriptions for each pet. You can even use the Pet Journal to rename your companions!
The Pet Journal has additional functions that will not be available until Mists of Pandaria. These include caging companions and creating a Pet Battle team.
Pets from all characters on a Battle.net account are now stored together in the Pet Journal. Now players can access nearly all of their collected pets from any character.
To ensure that all desired pets are added to the journal, it's recommended that players log into each character at least once after the patch.
Note that you cannot summon companions that are of the opposite faction (balloons and Moonkin Hatchlings). Also, the Guild Page, Guild Herald, Argent Squire, and Argent Gruntling are not considered account-wide.
Players that have collected more than one of the same pet but on different characters will find that some of these pets were automatically added to their Pet Journal. However, some companions have been classified as unique (such as achievement-rewarded pets), and these pets have been merged into a single pet in the journal.
The cap for total number of pets is 500 and players may only have 3 of the same pet. During the re-organization of collections, players are allowed to exceed these numbers. Once a collection total falls below, though, it cannot go above the caps again.
What's Missing From Patch 5.0.4?
Pet Battles and all the new companions (more than 200!) will have to wait until MoP. The ability to cage and therefore trade pets won't be available until the expansion as well. But on the bright side, this gives pet collectors some time to sort out their collections in preparation for all the new pets in MoP!
Behind the scenes, the entire WarcraftPets team is busy preparing this site for the flood of new pets. Our changes won't go into effect until shortly before MoP is released. When they do, you'll enjoy a new more user-friendly design that showcases all of the new pet battle abilities and stats.
As always, we thank you for your continued support!