The baby girl had been born healthy. Eight pounds, eight ounces. Then came the vomiting and crying. She wasn’t gaining weight. Her parents took her to the hospital, and again a few days later for diarrhea. Each time, the doctors sent her home with a new formula mixture, first substituting skim milk for evaporated milk, then one with soybean powder, suspecting a milk allergy. Two days later, the parents rushed their daughter back to the hospital …