Deer Slayer, I hived a 3# pkg on May 3rd and had another 3# pkg drift to that hive. I pulled the entrance reducer 4-5 days after that. It semmed to make them a lot happier. They didn't have to pile over each other coming and going. I noticed as the days went by that they were using the whole entrance, which led me to believe they were building all the frames. I inspected yesterday and was right all but 1 &2 & 9 had comb. I only run 9 frames in a 10 frame box. It is warm finally, I say pull the reducer!