Коммент с вовхеда:
Frenzy can be considered as the resources for Beast Mastery Hunter, each stacks of Frenzy increase Hunter's pet's attack speed by 4%; one can have 5 stacks of Frenzy max.
it generate by:

Claw / Smack / Bite (Basic Attack, 40% chance to generate 1 stack of Frenzy)
Т.е. с автоатак пета и не должно прокать.