my baby is sleeping only after the formula milk is fed inspite of being the breast milk flow is good

A. in first six months the minimum weight gain should be 500 mg per month and it can go up to 1 kg per month also. the urine output should be more than 6 to 7 times per day. the child should sleep afterd taking breastfeeding. meet the doctor for weight assessment. if the above criteria is achieved then the child is having adequate breastfeeding