I removed mine on one of my hives today. New hive (new beekeeper) placed on May 1 (six weeks ago). The second hive still has the entrance reducer. Now I don't know anything about this, but after a month, I didn't feel like the colony was strong enough yet. Now, it's growing (at one of my hives) significantly, and I think they are OK with defending the entrance, not to mention fact it was getting a bit of a traffic jam with the reducer on it. I also noticed some bees using back to get in hive, between the bottom screen and hive body. Attempting to attach picture of traffic jam.