Hello L&J's Mom!Congratulations on your bundles of love!! It's been a lifetime since I had babies so small. My only memory of them smiling at that age is when they had gas! ;)   There are several resident experts who will probably answer your question alot better than me. Let me direct you to a couple of them.   Jan Gambino is a resident expert here and she has written many share posts sharing her experiences with her "refluxers" yes there are two! You can read those postings here.   Tracy Davenport is also a resident expert and mom to a refluxer with complications of allergies! You can read about Tracy here and  read her postings here.   Good luck and please stay in touch. Let us know how L & J are doing!Vicki M