I have a 12 week old son who is FF, and not once has he spat the bottle out or given other "signs" he's had enough. He always falls asleep at the bottle that's the only sign but after taking the bottle away he wakes up for more. I'm kind of guessing at the moment from NHS feeding charts as to what he should be having. I make 5oz bottles at 2oz I stop to burp as he's a reflux baby. He will cry and show me he's still hungry. At 4oz if I don't offer the bottle back he doesn't cry for more so I take that as he's full. Many occasions I've let him try tell me he is full by just letting him keep feeding. 5oz and even a 6oz and it was a mess constant spit up, so again guessing it was too much for his belly. Anyone have any suggestions as to why this is? I just hope I'm not underfeeding or overfeeding and upsetting his belly.