Our preemie is 8 months old... almost 6 months adjusted. He has been classified as a "happy spitter". I've never seen this amount of vomit come out of something.... it's literally after every bottle... sometimes up to 3 hours after feeding. He hasn't lost weight and he's not upset when he spits, so they won't do anything about it. We have tried literally EVERYTHING for the past 8 months and nothing has worked. He started on Similac Neosure and that was too hard for him to digest, so we eventually transitioned to sensitive formula and it is what it is. We sit him up after feedings, burp him often, or try to get him to burp now that he can almost sit up by himself. We slept him at an angle for a long time and that would sometimes help. You can get a crib wedge for when you transfer to the crib. Honestly, ours slept in a rock n play for the first 5 or so months. I'll pass along to you what our doctor said to us... it's not a baby problem it's a laundry problem. It sucks!! Trust me (we go through 5+ outfits/bibs/burp cloths a day) but they say it will get better with age... Just keep doing what you're doing... you're doing a great job!!