Footwear retailer Brown Shoe Co Inc yesterday revealed a 2.2 per cent slip in May same-store sales at its Famous Footwear chain and a 6.1 per cent sales stumble at its Naturalizer unit compared with the year-ago period. The St Louis-based firm said monthly sales at its Famous Footwear discount chain were in line with forecasts but unseasonal colder weather had hit sandal sales at its Naturalizer chain which sells women's shoes.