I just realized this when someone pointed it out... Why would my pet not be using Growl if it's on auto? It seems I have to manually press it to get it to work most of the time.
Unrelated, is there a reason Misdirect would stop working entirely? I've noticed it will fail occasionally (says Ability not ready yet' indefinitely. No cooldown timer, nothing. It just stays unlit.) and requires a logout to fix.