I did the first 2 "walk-away" splits on May 23rd. Actually they weren't really splits, they were strong hives that I didn't want to swarm so I grabbed the queens and some brood and made up 5 frame nucs. How soon would one go into the queenless hives to see if they have been succesful in raising new queens? I have held off to date (even though I was dying to take a peek) thinking that the less they were disturbed the better. Given that the 24th of May should be day "4" and adding 12 days till hatching (that would make it around Sunday the 5th). I don't want to go in now for fear of damaging any cells that have been raised. Does a week or maybe 10 days after emergence sound reasonable? That should not interfere with mating flights (weather permitting) and may even the discovery of eggs? Sometime around mid to late June, or is that waiting too long in case they had a problem rearing a new queen?