Sometimes, when you keep 2 animals together, over time one will eventually become dominant and stress out the other to the point where it can cause regurgitation. I had this happen to me many years ago with a pair of boas which I was raising up in the same enclosure. When they were about 1 1/2 years old, the female out of nowhere started to regurge every meal because they were getting larger and the male was stressing her out. What worked for me and what I suggest you do is separate them permanently and then wait at least 14 days before attemping to feed your female again (feed a much smaller meal) and then at least 10-14 days for the next meal (again a smaller meal). This will break the cycle of regurgitation and by separating them you will remove the stress. ---------RON
P.s. Waiting an extended period of time between meals and feeding much smaller meals are critical steps to prevent future regurgitations.