Hi! Is there a girl our age? How much do you weigh? We're not gaining …

Hi! Is there a girl our age? How much do you weigh? We're not gaining anything, it weighs 7.9 kg, though we eat well. I was thinking maybe because of the stool, three times a day we have. Doesn't like water, drinks juice, could that be the reason? Eats almost everything we do. Active, doesn't sit still.