Value-priced footwear retailer Shoe Carnival Inc on Thursday posted a 10 per cent slide in first quarter net profit to $5.1 million from $5.7m in the same period of last year. The operator of 220 stores said net sales for the 13 weeks ended May 3 rose 5.8 per cent to $136.9m from $129.4m but same-store sales fell 5.5 per cent.