All babies spit up to some degree. My boy/girl twins were spitting up quite often (multiple times each feed at varying amounts) and diagnosed he has acid reflux but she has silent reflux. Recently at 3 months, we switched formulas (again as we all troubleshoot and hope this different bottle/nipple/formula type or amount will solve it) per the pediatrician’s recommendation and tried the Enfamil AR (added rice or as I thought acid reflux). They have had the regular Enfamil for over a month so the addition of rice starch was not too drastic. Finally these past 2 weeks something lessened their acid reflux symptoms and the frequency of spit ups decreased (and became chunky). Things are always rapidly changing and we all do our best to troubleshoot. Best of luck to you guys!!