Agree with @619a92cd86bd960014c02de9 here ..if the output is good then definitely the input is good ...
And also if the baby is active n fine then things are going great .nothing to worry ..

Please check the pee count.. if it is more than 6 or 7 then the baby getting enough milk

If ur babys pee count is 6-7 times in 24 hrs,then hes getting enuf!