Hi, just wanted to pop on and say that I didn't drop the df with my ds until around 10 months -- some moms do keep it longer -- I generally don't question good sleep too much! Is he taking good feeds at all the other feeds? My only concern would be of he's trying to replace another feed with the df (which wouldn't be awful either, there have been moms, especially working moms, who have done that too, just not the most practical way to go sometimes!). I might try keeping it as a shorter feed too and see if he still sleeps through.