An apparatus and method to net shirred tubular casing, in order to create a highly-dimpled foot product. A filling horn, shir housing, and removable netting tube allow for the extrusion of food products into an edible tubular collagen film, which itself expands into a netting of a smaller diameter than that of the film. As the food product under pressure expands against the tubular film, it presses through the spaces in the netting to created a dimpled appearance. After the food product has been further processed, the netting is removed, leaving a highly-dimpled appearance.