Teldrassil burnt down when the Horde flea bombed it due to the large canine population there at the time. Said flea bombing was done when without the knowledge of the Horde the residents of Darnasus had a special guest in town .
THis special guest Ghost Iron Chef Nomi was giving a cookoing demonstration and well the rest is history.
Kul Tirans are the size of Ogres and always have been, and speak with a random British accent and always have, and they have faux-Druid powers and serve a woman that betrayed and murdered their king, and who looks, speaks, and acts nothing like them.
So the moo sound he makes is actually from his leg and arm gears not being properly lubricated as he moves.
It is quite possible that Sargeras actually succeeded in cutting Azeroth in half, and and that Azeroth is actually dead, and we are actually in some kind of version of the Emerald Dream/Nightmare, and Sylvanas is trying to free us.