Alright so this is for hunter who are planning a race change. Lets start off with the basics:
1. The pet training quest is race-specific (you wouldn't want to tame moths near the exodar as a dwarf)
2. Race change is buggy
3. You HAVE NOT complete the other races' specific quest of the pet training.
So when I race changed, I leveled up 1 to 76 and went to train... Sure Enough, the quest "The Hunter's Charm" was waiting for me. It stays yellow no matter what level you are.
I did what the quest said... I went to Dun Morogh and talked to the pet trainer in the town there. I was wondering what I was doing there because I use quest helper =P. He told me to use "THE TRAINING STICK" and I had to complete a quest chain of about 3 times training things.
When I was all done with the line, they told me to go to Ironforge and seek out the pet trainer. After turning in that quest I had gained FIVE BARS! Because this quest always stays yellow, you will always get a reasonable amount of XP for it.
I will put up a video in the future I just hate the setup I'm working in... (I have to record with fraps, convert using Movie Maker then edit in Sony Vegas... overall process takes about 3 hours when I could spend 3 hours getting my website done)
THIS IS NOT A THEORY! DONE AND TESTED ON LOTHAR-US!
Oh yeah, forgot to tell you.... I went from Draenei--->Dwarf
Thanks guys!