You lose Ferocious Inspiration, but you gain Mortal Shots which is a big plus.
I'm not sure if it's worth it, but I'd guess so.
EDIT: I moved one point from Bestial Swiftness to Ferocious Inspiration. +1% is better than nothing, I guess, and unless your pet doesn't have Dash/Dive, it won't need the faster running speed. I also moved the two points from Rapid Killing and Go for the Throat to Improved Concussive shot. Not sure if that's an improvement either. Definitely not for PvE, probably not for PvP.
Edited, Apr 24th 2007 11:22pm by Mazra
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