My baby 7 month old his weight is loose day by day what to add in food Aur what to do

A. Namaste Mom, Baby now required semi solid and mashed consistency foods as such , here you could probably include ghee which can be added to his meals, apart from that curds, rice, dal, home made cerelac mix, porridge, fruits such as banana, chikku etc, vegetables such as potatoes , sweet potatoes, etc