I had to cull a queen today. I gave her a chance but the hive never built up like the rest of the hives and the brood combs had drone comb in a shotgun pattern throughout.
I have 2 mated queens laying like gangbusters in my queen castle and wanted to introduce 1 of them and her frames of bees into the now queenless hive.
I have a queen introduction frame and some candy. http://www.brushymountainbeefarm.com/Requeening-Frame/productinfo/274/ I was just going to stick her into the big part of the cage and seal it with candy.
When should I put her in the queenless hive?