There are some pretty big pikes in some of the rivers here. Tasty, but the big'uns may think you are too. Takes a clever fisherman to catch'em too.
But.. stuffed pike with ogre head? That sounds just yucky. Or did you mean to serve it back to Ogg as tribute, or as a plot to slowly civilize him?
"Here Oggsy, try eating yourself this much more delicious and refined way. Oh, and there is more of this delicious stuff way over in this opposite direction from where you are taking your army now..."
Could work, mebbe.