Look in UA, but I believe it's either an optional feat, or an alternate ability that you get at 1/2 level. In general, an animal companion is much better than a familiar.
Wow Rendrak will soon asks advice to his familiar, Next level the Hawk will communicate with him and have the same intelligence as him and 2 pts wisdom more.
I'll get you guys caught up as quickly as I can and in play. I need to finish the current dungeon then we should be okay. I may have you guys plugged in once they leave the cave or once they return to Sharn. I need to consider it a bit more.