Hubby and our little boy just came back from his 18 month check up @ the clinic, only to be told that our little boy has only picked up a kilo since his last check up - 6 months ago. He now has to go back in a month's time for assessment.

My little boy has a healthy appetite, is rather tall and is really hyperactive.

Should I be concerned about his weight gain? What can I do to help him pack on a few kilos?