So far in my testing I found that pets don't SEEM to help in battle yet. I'm not sure if that's because that feature is yet to be released or if your pets have to be grown to the Epic stage. I'll ask around and see if I can find out from KI.
What is your experience with pets helping in battle on the test realm?
Another code for the quickest wiz:
p.s. be sure to read about the GGG!Great Gobbler pet Giveaway.