Hello everyone. We tried different mixtures and finally, after studyin…

Hello everyone. We tried different mixtures and finally, after studying this topic, we arrived at Nanni's mixture. I would like to stop on this mixture, the percentage of iron and the overall composition pleased me, my little one also drinks well. But, it bothers me that the stool of the child is no longer mushy. Should I worry? Are there always such changes in mixtures?