by prolapse do you mean he regurgitated the meal? if so sorry never heard anyone refer to it that way, but one thing to remember even if there have been several instances of the regurge occuring you can start with a smaller prey item mayber mouse fuzzy or even a small mouse but you will NEED to increase his prey size so that he can continue to get the proper nutrition he needs!BTW good for for taking this snake in and giving it a home good to see still plenty of people out there that care!