Hi, my baby is 5 months old has been on breastfeed only. i did try giving him formula milk but he always rejects it. I'm still trying.i wanted to keep him on both breastfeeding and formula to avoid any dependency because there have been times when I had insufficient milk supply. also I am worried about his weight gain. he is not gaining weight which is why I want to add formula milk to his diet. please give me some weight gaining tips for my baby. and how can I make him drink formula milk.