The March 12 Newsweek magazine has a cover story on mad cow disease reporting that cats fed beef byproducts in cat food have developed symptoms of BSE. Prions seem to reside primarily in the brain and nerve fibers, including the spinal cord. Should Americans stop eating beef? The article certainly gave me more than pause. I still have some Wranglers in the refrig which I'll toss out, and I won't buy hamburger again. They haven't found BSE in America, but critics say they would if they looked harder. Of that British ground mad cow feed, it was shipped all over the world, to more than 80 countries. Indonesia imported some 600,000 metric tons, and Thailand 185,000 metric tons. These countries are apparently not monitoring for disease in animals there. Scares me. Margaret L