Thanksgiving shopping took a noticeable bite out of Black Friday's start to the holiday season, as the latest survey found retail sales fell slightly from last year.
Saturday's report from retail technology company ShopperTrak finds consumers spent $11.2 billion at stores across the U.S. That is down 1.8 percent from last year's total.
This year's Friday results may have been tempered by hundreds of thousands of shoppers hitting sales Thursday evening while still full of Thanksgiving dinner. Retailers including Sears, Target and Wal-Mart got their deals rolling as early as 8 p.m. on Turkey Day.
Meanwhile, IBM says online sales rose 17.4 percent on Thanksgiving and 20.7 percent on Black Friday, compared with 2011.