I fed all 3 of my children SMA gold and never experienced the green poo. How old is you baby? If the baby is still just under 6 months and still not weaned onto solids then poo can sometimes be green, when they are on solids then the colour can change. I would speak to your health visitor before you change to any other brand, as changing brands can cause tummy upsets, if there is not other issue talk to her first then decide what you want to do. HTH :)