My 12 month old boys wake to eat 1-2 times a night. And until recently, they would nurse for 10-15 minutes, pull off and go back to bed without a fuss. The last few nights when I feed them they want to pacify on me for an hour or more and scream their heads off when I unlatch them and try to put them back in their cribs. I have no clue what happened! They have always gone to sleep on their own, and are often awake when we put them back in their cribs after a night feeding. It has never been a problem for them before. Does anyone have any ideas why this might be happening all of a sudden??