My LO is 11 weeks today and EBF, and I'm worried about his weight. He was born on 50th centile and has dropped to the 1st centile - he dropped considerably first few weeks as he was a very sleepy baby and we also had some problems with latch. He was back to birth weight at 5 weeks and since then has been putting on about 150g per week, however last week he put on 100g and this week 90g. He has been diagnosed with silent reflux and he seems intolerant to soy and dairy so have cut it out of my diet. I've been given alimentum as a formula to top him up with but not sure whether to use it or not. He has plenty of wet nappies and every 5-7 days he does a massive poo. Should I be worried and top him up with this formula?