DD6 is very tall and very skinny. I've just calculated her BMI on NHS website and she's 5th percentile, so still 'healthy' but quite borderline.
I wouldn't really say she's thin, she's just a very slight frame. She's it's ok but not a massive foody. Normal active child. No health concerns.
I just wondered if other parents would actively encourage weight gain (e.g. use higher calorie content foods etc) or just leave her be?