How Old is Too Old to Breast Feed Your Child? How Old is Too Old to Breast Feed Your Child? How old is too old to be breast feeding your child? A controversial case out of Illinois has re-ignited the debate. A young mother there is still breast feeding her eight-year-old. Should she be forced to stop? Lynne Stuckey said she has been unfairly persecuted for doing something that is perfectly natural: breast feeding her son. But there's a twist - her son is now eight-years-old. "I did nothing wrong with nursing my child. Kyle is my only son...