Smithfield Foods Reports Higher Profit  CHICAGO (Reuters) - Smithfield Foods Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=SFD.N target=/stocks/quickinfo/fullquote"&gt;SFD.N&lt;/A&gt;, the  largest U.S. hog and pork producer, on Tuesday reported  higher  fiscal second-quarter profit due to strong hog prices and the  acquisition last year of Farmland Foods.