The use of fully slatted flooring and absence of bedding for finishing pigs are being questioned for welfare reasons at Council of Europe level and have already been made illegal in some EU member states. Part slatted flooring offers an alternative, but their success depends to a large extend on the correct use of functional pen areas by the pigs: dunging should take place on the slats, lying on the solid floor. Pen lay-out has a large effect on the degree of pen fouling. The effects of straw provision on the solid floor area are less well documented. The present study tests the hypothesis that pen fouling in a converted standard Dutch pig pen is not affected by straw use, but by the position of the single space feeder as well as the position of a 40 cm chain (toy).