[GAMEPLAY] Rengar missing sound file for Empowered Q on Headhunter Skin

I have been a Rengar fan since he was released and have played him through his nerfs, buffs, and changes. I've also really enjoyed his Headhunter skin as it provides a cool alternative look for a champion I love. One thing I have noticed about the skin is that it is missing a noise that used to be in the game. The sound I am referring to is the eerie predator-esque howling noise that triggered after Rengar would use his Q with 5 stacks of ferocity (Empowered Q) on a target. The noise begins after Rengar gets the bonus attack speed from hitting the target.

Here is the sound I'm talking about. It's around 1m 30s: http://youtu.be/dPeFK_CFEg0?t=1m30s

As I recall, the noise went "MIA" after Rengar's kit change back in April of 2014. The skin has a few different particles and noises that really complement his predator theme. This sound was one of those noises and I hope my kitty-cat can get it back.