Hi, My son is 9 months old now, and I have just...

Hi, My son is 9 months old now, and I have just started (2 nights ago) to give him the bottle at night before sleep. I am using S26 gold. He cries and gets upset when he sees the bottle, but with some patience he drinks about 100ml only. I did not have this problem with my daughter (now 4 years). Any advice on this? Is 100 ml enough for him? He normally has 3 breast feeds a day. Thanks :-)