Are all the babies that were weaned years ago at 4 months now doomed to digestive problems? I had my 4th child a few weeks ago and of course ive been given all kinds of information re weaning at 6 months, but i was given all this info with my first and second child only it was to wean at 4 months, im sure this has been brought up many many times on here, but im curious really, my first 2 children were weaned at 15 and 16 weeks, and they got on really well with it, LOVED all the new tastes and thrived incredibly, they've certainly never had any problems and they are 10 and almost 8, surely human physiology doesnt change??