Im general my dog attacks and obeys my commands, but at times, he just stands there, with enemies around him, doing absolutely nothing. I have to click on the attack command or on the follow me command a few times so he snaps out of it. And at times, even if he's surrounded by monsters that are attacking him, he'll just stand still and let himself be killed. I really like the concept of pets, and would love to see them work perfectly.
Also, he seems to have a knack of disappearing (but still being physically there) after coming out a cave. He cant attack, but he can move and be healed. :/
Thats on my lv 15 aritificer Fullmettal on Sarlona.