Breast feeding is the most nutritious form of nourishment in infants and is recommended for at least the first four months of life. Breast fed infants may develop milk protein intolerance. The management of breast milk protein intolerance differs from that of cow's milk protein intolerance in formula fed infants. Because breast milk is considered by many to be nutritionally superior to formula and results in maternal infant bonding mothers are often told to continue breast feeding. Despite the lack of evidence based data to support or refute the modification of the mother's diet, it is suggested that they eliminate their own intake of dairy products strictly and avoid supplementing with a cow's milk based formula. Investigators are doing this study to demonstrate that the deletion of dairy from the diet of a breast feeding mother will not cause breast milk protein intolerance to resolve.