I'm wondering if anyone has any advice on how I can better manage my DCs' diets.
I have 3 DC aged 16, 12 and 6. 16yo is a decent eater now, not that fussy anymore, but has a sweet tooth and eats a ridiculous amount of cereal, and fairly often gets up in the middle of the night to eat cereal. The vast majority of the time, I cook good, well balanced meals with lots of protein and carbs, appropriate portion sizes, but the cereal thing has become a habit. Despite this, he is bordering on underweight. He's very tall, very sporty and clearly very effective metabolism!
12yo is naturally very slim - eats well and has never been fussy. But I sometimes feel her portion sizes are quite small. She's healthy and quite health-conscious. Her weight is in the normal range but lower end.
6yo is overweight. She's not fat but she is in the overweight category. She was a massive baby (almost 10lb) and has stayed on the upper centiles. I'm really trying to manage her weight as I don't want it to be something she is conscious of and I already see her looking at her tummy in profile in the mirror. But she just seems to want to eat and eat and eat. I don't want to restrict her if she's hungry and I offer healthy snacks etc but she always wants more. She has a sweet tooth and loves carby foods. She's pretty active - walks to and from school every day, does gymnastics, swimming and hockey on a weekly basis, is starting football too, and we go for lots of walks. Puddings and treat foods are restricted to weekends, she doesn't have sugary drinks aside from fruit juice in the morning, but I can often tell after a weekend of having a few treats her weight has increased.
What I struggle with is how to help my son put on weight while also trying to help my daughter grow into her weight. When my son wants food outside of mealtimes, I let him but then my DD also wants something and she doesn't need it, she just wants to eat and she'll say it's not fair if he is allowed something and she's not. I've tried increasing his portion sizes but he will never eat beyond when he feels he's had enough and then my daughter will want to finish his plate! I try to get her to drink more water but she will argue until she's purple in the face that she's not thirsty she's hungry.
I admit I'm finding it exhausting and stressful. I just don't want this to be an issue for her.