My 10 year old daugther started using Culturelle Kids probiotics 6 days ago to maintain her gastrointestinal health (because of gas and constipation). I've noticed that the color of her poop has changed. It is not brown, it has a yellowish color. She is no longer constipated. Her stool is passing perfectly fine, the only thing I've noticed is the change in color. Is this due to the probiotics? Is this normal?