Can we get a flat belly just by running every day, without doing any crunches?

No...Ask me directly for customized diet plan for you. 

8 kgs for a 2-year-old baby girl is good. You need not worry. While growing up, children tend to lose their appetite and be very selective towards what they want to eat or not. Iron/ multivitamin supplements at this early stage is something that I would not recommend as we should try to feed childre....

High fiber low fat foods especially all greens and fresh fruits, sprouts , oatmeal etc.