Refuse meal and milk (17.5 months old)

Sigh.....
This week Richie starts rejecting meal and milk....don't know whether he's sick of the rice and soup or just not in the mood of eating.
He eats very little then left the chair for playing...aiya....
My mom always reminds me that sometimes child is like that, sometimes he wants to eat sometimes he doesn't want to eat. Well, I know that it's not the first time he likes that but it's so heart breaking to see the food prepared go wasted and I also worry if he doesn't have enough nutritions especially after his diarrhea.

Hopefully, his mood backs to normal when mommy and daddy are going for holiday