I tried requeening two colonies two weeks ago. I found and killed the old queens and place the queens in their mailing cages in the colonies. I waited 2 days then removed the cork over the candy. When I checked them at one week I had queen cells and no eggs in both colonies. I removed all the queen cells. I checked again today and cut queen cells out again--still no eggs. New queens were delivered today. I placed them in nuclei for introduction. How long should the queens lay in the nucs before using them to requeen the larger queenless colonies? Is a week long enough?