Antibiotic residue in milk is highly regulated, at least in the USA. When we treat a dairy cow with antibiotics (to cure an infection and save it's life) we don

Antibiotic residue in milk is highly regulated, at least in the USA. When we treat a dairy cow with antibiotics (to cure an infection and save it's life) we don't/can't sell it's milk for several days after the end of the round of antibiotics.