my baby is 9 months old. she is on formula milk (Nan pro stage 2) and solids - banana, apple, watermelon and curd some times. since a week she is passing green stool around 3 times a day. no loose motions but smelly dark green stool. should I be worried? with the same food till a week back her stool was normal yellowish colour. she didn't have any green leafy vegetables or any green food. it's been a week. should I give her any medicine or alter her diet