My daughter is 8 months old and loves her food! She has, for the past week, been refusing her formula and having more food. I've made sure I've offered the bottle and she does have her first bottle in the morning, usually around 8/8.30, she was having 9oz but now is only drinking about 5oz.. I have been wondering if she should be on some vitamins and which you guys recommend and where to buy?.. any suggestions?