in 1 end - out the other!

Tyler has been on hungry baby milk for a couple of weeks and I started to wean him 3 nights ago. The trouble is for the last week or so he has been pooing alot about 4/5 times a day - not particulaly(sp?) runny or firm (sorry if tmi) BUT the last 2 days he has been doing one about 20 mins after EVERY bottle and then he has also gone twice in the night! He was only waking once in the night and I know he was about to drop that feed coz he would take about an ounce of it and go bk to sleep. It goes in 1 end and out the other! He dosnt seem uncomfortable and is still his chatty, smiley self. Why is this happening? What can I do? I WANT TO SLEEP!

xx xx