DOCTORS and midwives have been telling mothers for years that breast is best for new-born babies, but their hand was strengthened recently by research from paediatricians at the University of Wales College of Medicine, who showed that breast-fed babies were less likely to get urinary tract infections. In a study of 41 healthy babies, they found that bottle-fed infants had significantly lower levels of antibodies in their urine at 10 days old than the average.