Is the cow's milk in formula drug free? Antibiotics for mastitis? Worming medicine? De-lousing and tick treatments? Fertilizers and chemicals in the feed? Chemical sprays to clean and de-infest the dairy?

I'd rather take my chances with trace amounts of alcomohol.
And caffeine, and preservatives and artificial colourings from dietary sources, and pesticides and insectides from fruit and veggies, hormones and drugs from the meat you eat etc etc