hun xx My daughter will usually feed between 10 mintues to half an hour and I don't always swap her half way through. I was told by my HV (as stated above the advice varies so much) that it is not always necessary to offer both boobs at each feed, the important thing is that if you swap half way through the next feed should start on the boob you finished on and if you didn't the next feed should start on the boob you didn't feed on. Apparantely the only reason the baby might want to swap half way through is to get the first milk which is more like a drink. My daughter is now almost 6 months old and I have no idea when I am empty because as stated above I am rarely "hard" full, but she does tend to fuss more if she feeds for too long on one side, presumably because the flow slows and she will also massage my boob with her fists x I wouldn't stress about emptying x