There were a few issues here in the very early weeks when DS1 (who was 20 months) would give DS2 a bit of a tap on the head at feed times. But it was really not much of an issue and I can't say for sure whether it was because I was b'feeding him. I actually haven't fed the boys together, I feed them seperately and so DS1 came to know when it was his 'turn' and when it was his brother's turn. I couldn't physically work out how to feed a 20 mo and a 10 lb newborn at the same time! LOL.