My LO is 2 months and is on formula and bf. He had not been pooing for 3 days is it normal? He keep make shitting sound I don't know should I give him a bit of plain water..

he seems constipated. as he is still young. do not give plain water or any prune juice. What you can do is to do some stomach massage for him. hold his knees together and go into a circular motion over his tummy. It will help to promote tummy circulation