What should be weight of 3 month old

High fiber low fat foods especially all greens and fresh fruits, sprouts , oatmeal etc.

Take high fiber low fat diet. Drink lot of water everyday. Take small and frequent meals at regular intervals of 2-3 hrs. Avoid outside food completely. Do crunches and pushups daily to reduce belly fat. Ask me directly for customized diet plan for you. 

please read the link below for detailed information on the condition. https://ghr.nlm.nih.gov/condition/bardet-biedl-syndrome