Shadowpacks still infest the Yew forests, make no mistake about that. I spent 2 or 3 hours this morning wandering about encountering them. I managed to clean out about five large groups but when I returned to the Abbey for a rest and set out later, I found Shadowpack in the areas I had cleared earlier. They are either still spawning or perhaps the ones I encountered had wandered in from other areas.
I urge all the Shadowpack hunters to sweep the Yew forests in an effort to destroy every last vestige of this defeated scourge.