The present invention provides a method of forming an edible animal chew comprising the steps of (a) extruding an edible composition followed by (b) contacting the extrudate with a plurality of post-form rollers (2), at least one of said post-form rollers exhibits an undulated surface (10) and contacts the extrudate with said undulated surface, the undulated surface comprising a plurality of nodules (4,6,8,12) for imparting undulations onto the extrudate surface, wherein at least some of the nodules (4,6) have an elongate shape and are offset at an angle to the rotation direction of the post-form roller, said elongate shapes being oriented in two or more different directions.
