my son is 9 months old,he is 7.2 kg.how do I increase his weight. my second qn is he has not started crawling yet.he moves forward,but does not lift his belly.do I need to worry?

A. For weight you should give proper veg proteins to the child good dairy products to the child that will help in a proper diet and for crawling you should wait till the age of 10 months a child will start crawling any time between the age of nine months to 10 months completed