I know this may sound crazy. But my baby has been using dr browns bottles since birth (he is 7 months now). A little over a week ago I switched to Avent bottles as I felt he didn’t need the Dr. Browns anymore and I hated cleaning them. The next day he got super constipated and was straining so hard that he would throw up. I finally switched back to Dr. Brown’s yesterday and he pooped for a good poop for the first time since I had him on the avent bottles…

He is on solids but he didn’t have any new food in his diet. I don’t know if this is a coincidence or not but it’s really weird. Has anyone else had experience like this? Maybe it was the nipple flow or maybe it was just a coincidence?? He has NEVER been constipated before. He’s pooped at least once a day since birth. He is also formula fed idk if that makes a difference