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The highest of all veterinary drug residues are found in bob veal (calves under three days old that weigh only 70 to 100 pounds) says the USDA Inspector General report.
“Farmers are prohibited from selling milk for human consumption from cows that have been medicated with antibiotics (as well as other drugs) until the withdrawal period is over; so instead of just disposing of this tainted milk, producers feed it to their calves. When the calves are slaughtered, the drug residue from the feed or milk remains in their meat, which is then sold to consumers.”