Dear Erika, Milk from a breast which is involuting or "drying up" will have a higher salt content, thus leading to the taste problem. This can also happen in cases of mastitis. In hindsight, you have probably already concluded that using different positions is much less of a nuisance, in the long run, than having to nurse on one side only. With a baby this age, I don't know how long it would take to rebuild a milk supply on the right side with regular pumping. At some point, at least the taste may begin to change and with some good positioning, he could start nursing again comfortably on that side. Another possibility to consider, although uncommon, is that there is something wrong with that breast. From BAB, "Goldsmith (1974) documented the cases of five breastfeeding mothers whose babies suddenly rejected one breast, and weeks or months later a mass was found that proved to be malignant." It is something to consider, although much more likely, especially at that age, is a one-sided nursing strike, for whatever reason. Persistance and creative positioning should rule the day. Don't pressure your son to take that side, but continue to offer it, with skin-to-skin (perhaps in the tub or while walking around) in a position which seemed comfortable to him back when he was nursing on that side. Some one-sided nursers can be fooled by a mom shifting from a cradle hold on the left breast to a side or football hold on the right (or vice-versa) - that way the orientation of the head does not change very much. Be patient and you may be surprised on day to have your son latch on as if nothing bad had ever happened. If there is a LLL group near you, I would encourage you to attend. They can give great support during a nursing strike and probably give you some good tips, too. Sharon Knorr (who is tired of reading and writing now, and will go to bed) Lactation Consultant Services Rochester, New York mailto:[log in to unmask]