http://www.goodintentionsguild.info/hunters.html^^^
This has every bit of information on pets and hunters you will ever need. It explains the differences between the pets, what pet skills are available from what mobs and taught me most of what I know about hunters.
As for pets I like cats so here are three she might want to check out.
The Rake (Level 10 rare). He's a normal looking lion with 1.2 attack speed.
http://wow.allakhazam.com/db/mob.html?wmob=5807Humar the Pridelord (Level 23 elite). He's the only black maned cat in the game and spawns at the big tree North (and a little East) of Ratchet that is surrounded by lions. (This is the cat I have leveled with since I got him) has a 1.3 attack speed.
http://wow.allakhazam.com/db/mob.html?wmob=5828Broken Tooth (Level 37 rare). Reportedly a 1.0 attack speed cat but I never trained him.
http://wow.allakhazam.com/db/mob.html?wmob=2850If she wants more help just repost here or whisper me in game and I'll help with whatever she needs.