How can i tell if my daughter has a metabolism problem-she is chubby, big belly but doesn't eat that much?

Review her growth : Charts with her pediatrician. Have her ht. & wt. Grown along a curve or ⬆ed excessively ? Normal curves are 5th-95th %ile; avg. Are 25th-75th%ile. Has her body mass index ⬆ed over time ? Normal range is 5th-85th%ile; avg. Is 25th-75th %ile. Low daily activity levels, > 2 hrs./day of "screen time, " family history of obesity, & consumption of high-fat foods & sugary drinks also ⬆ weight.