I know this is a very delicate situation that I am also going through with one of my boas at the moment. Based on some very good advice I found on another forum, I am waiting 3 weeks to feed again and I will be feeding a VERY small meal. The plan is to then wait another 2 weeks before feeding another small meal. After that slowly increasing meal size. Just for reference, prior to regurge, I was feeding my 11 month old boa one rat pup every 7 days. Good luck.