What I do is I leave my snakes with each other for 4 days then separate for 7 days. The first 2 days after I separate them (so the 3rd day) I attempt to feed them if they take it great. Then the day before I pair them up again (the 6th day after the pair was separated) I try and feed a smaller meal to any of the snakes that did not eat.

Thats how I do it and I have no problems at all

Good luck to ya Hope this helped.