My son is 10 month old he was loosing his weight a lot which food can be given for weight gain

A. Hello mom first you need to find the reason for him loosing weight ? Does he have any health issue as such ? Also for now you can give him some milk products such as panner , ghee , curds , millets like ragi , bajra etc , dals and legumes such as channa, rajma etc , dry fruits , egg yolk , fruits such as banana , Chikku , avocado etc , vegetables like potatoes , sweet potatoes, carrots etc