Tremor totem is dead, it doesn't activate to free pets at all. Not on the cast, not on the iterations.
It's supposed to free every living from fears/sleep/charms in your party. From very recently it ignores pets.
Tremor totem mechanic is like 45% of the reasons for me to play Wotlk (Windfury proc are the other 55%), I stopped retail when they changed it.
https://www.warmane.com/bugtracker/report/102398
