Greetings. What is it my dear.!! You can not buy what you want. Give full diet. Keep him active , socially engaged and mentally challenged and busy. DON'T worry of weight gain . Now a days we like thin active children bubbling with energy. Change your outlook. Don't forget immunization, Hygiene. Respect your child's emotions. Never shout or abuse or argue in his presence. It gives them behavior problems.

It depends on the weight of the child and the growth pattern of the child. If nan pro and other weaning diet is being given and growth pattern is normal , then to just monitor. However , growth pattern should be assessed and nanpro 2 alone is not sufficient for meeting  child's requirements.

Well I got your concern Continue feeding Regular weight monitor and plot it on growth chart If more concern then please connect online Thank you

Please check ur child's weight If its in normal range, nothing has to be done. If it is significantly low, there is problem in feeding. At 7 month, feeding only nan pro 2 is not sufficient. Get proper diet plan from pediatrician