Hi N.! Congrats on your little boy! I, too, had a preemie. Ben was 8 weeks premature and his biggest issue was the bottle, as well. It may take a couple of weeks for him to get it, so just be patient. Smaller babies have a hard time with the suck, swallow, breath. It takes a lot of energy out of them. If he is consistently spitting up his feeds, he may have reflux. Another issue Ben had up until just a few months ago (he's 18 months now). His reflux was severe, it was awful. If you experience a bad case of reflux with Jacob, my best suggestion is to use the receiving blankets as burp cloths. It will save your clothes!!! Also to pack many extra pairs of clothing on outtings, and lots of bibs, lol.