Hi Amelia. Just do what you think is right. I was told that you drop a feed a week to wean properly. I was comp feeding with both my dd's and never really had any supply but I do know that cold turkey is painful for you. I think it's good to gradually intro formula while continuing bf for a bit just to let thei gut get used to it. My girls were full time ff from four months old on s26 gold and have never been constipated. I think maybe drop a feed a week if you want some sort of plan but you can go quicker than that. I hope that helps!