I breastfed my son for almost 10 months. We have been fortunate and he has been fairly healthy - no ear infections and just minor colds. His levels were o.k. the first year but lately they have been creeping up and when have increased his dose to higher levels (which I am getting nervous about). How wonderful you were able to breastfeed with twins. I am so amazed by parents of multiples. I am wiped out by one!