Level 10 changes the flavor of hunter-hood: Your hunter quests at level 10 will net you a pet.
Skills, Level 10
- 10: Aspect of the Hawk (Rank 1), Serpent Sting (Rank 2), Track Humanoids, Tame Beast, Call Pet, Dismiss Pet, Feed Pet, Revive Pet
Your trainer will also give you quests for taming pets. If for some reason you've left your native newbie zone, the local hunter trainer may not have the quest for you. Taurens need to go to Bloodhoof Village, Night Elves to Dolanaar, etc. Your trainer will give you three successive quests to tame some kind of local fauna, and then you'll get the skills to tame your own pet. Make sure you talk to both the hunter trainer and the pet trainer so that you pick up the full gamut of skills - Tame Beast, Call Pet, Dismiss Pet, Feed Pet, and Revive Pet. A lot of hunters wander around confused about the feeding process initially; it's usually because they missed the quest for the skill.
A couple pet-related macros:
#showtooltipThis will cast Feed Pet and select whatever food is in the specified bag slot. The location format is
/cast Feed Pet
/use 3 1
#showtooltipThis is a left-click, right click macro. I use a lot of these. This one casts Mend Pet (which you haven't learned yet) when you left click and Revive Pet (which you do have) when you right click. Even if you don't have one skill or the other, you can still use it for the other skill with the appropriate button.
/cast [button:1] Mend Pet; [button:2] Revive Pet
Your pet is going to come with Growl, Cower, and some family-specific abilities. Petopia is an awesome source for browsing pets. Regardless of what you pick, you'll want to open your Spellbook, go to your pet's spell page, and drag Growl, Cower, and maybe some of his other abilities down onto your pet's action bar. Right clicking on an ability will toggle autocast; if there's a moving gold border around the spell, it's on autocast. You want autocast ON for Growl and OFF for Cower. (Note that in groups with a tank, the opposite is true.) Also keep your pet's basic special attack (Claw, Bite, etc.) on autocast. You can always left-click an ability to cast it, as well. Note that pet spells tend to be buggy and turn themselves back on to autocast if you don't leave them on the toolbar. This is why it's important to keep skills you don't want to use on the toolbar.