I dried up when DS1 was 3 months. I was already supplementing due to reflux and jaundice at birth but then going back to hectic stressful work where I could barely squeeze in 1 pump a day finally did it. I only got 1 oz after 20 min. So I just stopped one day and fed all formula. It actually helped with his reflux to to have the thicker formula. He was fine since I had supplemented from day 1. I'm still going strong with DS2 who is almost 4 months and is EBF (pumped) now.
Re: When did you dry up?