My LO is 9 months old and still EBF with solids. We're going on a trip overseas at 11 months and I'd like to completely wean him by then. We're going to ask his doctor about this and whether or not we can give him cow's milk at that time.

I know all the recommendations state that you should only feed breastmilk and/or formula until 12 months, but is that a hard rule or is it a bit flexible? When did you stop BM and/or formula and move to cow's milk?