My child (3 years old) has not pooped in 5 days and he has this habit for quite sometimes. I have tried to include more vege, high fibre foods in his daily meal and reduce milk intake. However, no improvement so far. Any recommended food @ supplement that can improve digestion?

I feel you mommy. Based on my experience with my 4 year old son, what I did is I immediately change his formula milk and give him veggies smoothies or freshly made juice for his fiber intake. And this changed the way he poops. He is not constipated anymore and a little change with the consistency of it but I think it's just normal. Please ask your pediatrician what formula would best for your kid if he is bottle fed. Also, I don't allow my child drink soda because that also cause constipation. Keep up the good work of giving him high fiber food.