hi My boy is 20 days old now but Ithink he is always hungry even after feeding of approx 20-45 min he gets hungry just the next hour and after every feed he urinates and get hungry again if I gave him the formula milk then he is ok or I think his stomach get full on that but On BF I think he is always hungry should I Give him formula and bf simultaneously ? also when hungry he becomes too fussy at that time is this all normal ! If given formula milk little more then bf do it affect on growth ! thank you