Koppig (Stubborn) is an artwork made for Stadsmuseum Woerden. Together with Maus Baus, Suzan Hijink created a 5 metre large artwork about the cow market in Woerden.
 
The left side, made by Maus Bullhorst, is representing the cow market from the past. The right side, made by Suzan Hijink, is representing the modern cow market.