#AskTheExpert Namaste,Greetings oc the day, My son is now 13th month and 20 days old, he is doing potty 3 times per day, and his weight isn't gain, how can I gain his weight properly and he still not walk by himself, he can walk by any support and he can stand himself,so what I have to do for him to walk early by himself,want to give him vitamin d and multivitamins for him and doses for him thanks