Unfortuneaty we were not very quick to pick up on what was happening, and it took months for us to figure it out. So, we are still dealing with it to a degree. My wife is still breasfeeding, and our son is 22 months old. in our experience, kids can certainly react to foods you eat that are passed through the breastmilk. get on top of it right away, and don't make the same mistake we made, and your child should grow out of it fast enough...