There are 19 new pets to collect including the new Raiding with Leashes II set from Burning Crusade.
Collecting all 10 pets from Karazhan, Serpentshrine Cavern and Tempest Keep will reward you with Tito.
Throne of Thunder
The Unborn Val’kyr is the only wild pet to come out this patch and may be found all over Northrend. Capturing (or killing) one will affect the spawn rate of another appearing somewhere else on the continent.
Brutal Pet Brawler: Win 250 PvP pet battles through Find Battle with a full team of level 25 pets.