My daughter asd device a year back and since then her weight gain was only 1kg more.her echo reports were all fine. She is eating properly too but isnt gaining enough weight.and now her cardiologist told she shd gain 3 kgs more in a year else it will cause issues to her heart. I failed to understand how? She is on additional nutritional diet but still weight gain is just 100grms per month. I dont know what to do?