My DS1 was exclusively BF. I'm considering giving DS2, now 19 days old, a formula feed - or perhaps just a top up - at 10:30/11pm, to help him sleep longer at night (to give me more energy for days with DS1). What brand of formula do people recommend? One of the reason's DS1 was BF was to help prevent eczema, as I have a history of it -but is this a genuine issue with formula? Does any one have any other tips for introducing one formula feed?