Believe that pet collection is a hobby more than Leisure for most players, in order to satisfied players, Blizzard opened a series of achievements to back to the previous patch: Raiding with Leashes, Raiding with Leashes III. Traced back from MC to SW, give pet fans a new reason to farm old patches.
In the early released 7.1, Raiding with Leashes IV:Wrath of the Lick King started too. This time we have the 80's classical raid Ulduar, Trial of the Crusader, and Icecrown Citadel. From the earliest raid achievement mount Mimiron's Head in Ulduar to Invincible's Reins in ICC. From Shadowmourne to Val'anyr, Hammer of Ancient Kings. From TOC Attempts to Ulduar 0-Light Yogg-Saron. Players who experienced these patches must impress the raids and mounts. And for players who did not get mounts, it is another good reason to farm the old versions.
All of the pets in Raiding with Leashes series drop from bosses of the old patch raids, these pets are equivalent to mini-boss. Pets are also Cageable and can be purchased from Auction House with WoW Gold currency. If you still feel a little resentment of these patches, do one farm a week at least. If you already owned all set pieces and mounts, then purchase all pets from AH is the quickest chosen. You will gain pets by completing the achievement. The reward of new Raiding with Leashes is A Celestial Invitation, you can fight against the Algalon in Ulduar by using the invitation, and gain a Starlight rabbit called Stardust.
It is time to hang around in these classical raids, for pets, for mounts, for the memorial!