Hunters, your pet bar has changed. The options are now....
Passive->same as always
Defensive->pet will attack anything that attacks it or you
Assist->pet will attack what you're attacking
So, if like me you were very confused as to why your pet seemed to be acting like it was on passive in dungeons instead of defensive, that's why. You want your pet to be assisting and so far I really like the new option.
In other news, Garetia's now geared enough to run heroics. Granted she's geared in a really weird mix of AH greens, one purple alchemist trinket, one pair of blue justice point gloves, and now the new purple from starting the Hyjal dailies, but she's geared!