The patch notes for Patch 3.3 on the Public Test Realms have been updated. You can find the full notes on the PTR forum or the normal PTR notes page, but as usual MMO Champion has been kind enough to post a notes comparison.
So what’s new for hunters and pets? Just this one note:
Pet Leveling: Hunter pets now need only 5% of the experience a player needs to level, down from 10%.