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All this, including the sound effects, has been reported to the U.S. Department of Agriculture, whose swine experts are interested but still somewhat skeptical. They point out that the necessary apparatus is expensive and complicated. They fear that the sows will be damaged physically or psychologically when their piglets are taken away. But their real worry is a problem of acoustics. They suspect that under average farm conditions, the recorded dinner music will not wake all the little pigs and save them from the dangerous error of missing a meal.