DS is just 5 and has lost about half a kilo in the last year (in other words he weighs less than he did on his 4th birthday). He otherwise appears to be in robust health (rarely ill, plenty of energy etc).
He’s quite fussy with meals and not really interested in food unless it’s beige or sugary (ideally both).
I’ve tried to follow the advice about not pandering to fussy eating habits - the whole ‘you can lead a horse to water...’ philosophy. And he’s just not really eating.
He was weighed at school a few months ago and he was within normal range although he does seem to have got skinnier since then.
When does it become a problem?
(At the other extreme I have a younger DS whose wants seconds of everything and is rocketing off the centile charts so I just feel I can’t win at the moment)