You have got to be kidding me! Since when does breast milk come with the choice of vanilla or chocolate? One company is offering just this for so called "picky eaters" over 12 weeks. If I remember correctly, they do not develop taste buds until much later so what you are offering them should be fine. What will happen when you start to offer vegetables at 6 months? Giving sweetened chocolate milk then trying to offering smashed peas will be a big difference in taste. Then there is the sugar being fed at such an early age when there is not a need. Let them get the sugar naturally from the solid food being fed. Just another marketing gimmick to lure mom's who have lack of sleep, who do not consult their physician(which i am sure would not suggest use of)and are willing to try anything to get their child to eat and sleep on a scheduled basis.