Other than the little excerpt from the book, all I could find was this...
http://whfb.lexicanum.com/wiki/Ogre_Tyrant#Blaut_FeastmasterPretty much all there is on them I am afraid dude

Effectively, best way to show they are from the tribe is loading out on Butchers, and anywhere a Gnoblar might be, replace with a Halfling model

JJ
Resident Smiley Spam Artist and Fastest Fingers in the Stronghold.
Raising the forum's smiley count, one post at a time, since 2008
After all, painting 100 night goblins is something you do in the morning just before you are off to work.
And I think you missed a 0 when you wrote 11 armies. The correct nr should be 110 armies I would think, based on your painting speed.