Training the Beast
Speak with Ormak Grimshot in Orgrimmar.
Description
You now have the power to tame a pet, but you must also gain the skills to train it.
Travel to Orgrimmar. There you must speak to one of our most revered hunters, Ormak Grimshot. He will give you the ability to train your new pet. You will find him near the Hall of the Brave.
Good luck, <name>.
Completion
A young hunter, I see. Yes, I will grant you the skills you need to train and guide your pet. Not only will you be able to teach your pet new abilities, you will now be able to feed your pet, as well as revive it, should it fall in battle.
Now, go, hunter. We will speak again, at a later date.
Rewards
You will learn: 
Beast Training