I have one hive that was started from a package this last may and they did very good all summer and built up stores and the queen was a laying machine. Over the course of the last couple of weeks they have gotten to the point where I can't open up the hive anymore. I checked them about 3 weeks ago and due to the birth of a new child wasn't able to get in. Went in this past Saturday which wasn't the best of days but my other two hives were OK with me being in there so I figured they would be also bit they were not and I could barely make it through the first hive body before I had to call it quits. Was in long enough to see a couple of queen cells and tons of capped brood and no eggs. Fast forward to today and got through the first 2 hive bodies and things were going so so, they were buzzing around me but weren't trying to sting and then started on the third box and they just lit me up and I got stung a few times before I could run away. Waited 10 or 15 minutes and went back and smoked the tar out of them to try to finish my inspection but as soon as I got a hold of a frame I could hear a roar from the hive and left. I went back to the house and put on my heaviest shirt and put on my welding gloves and taped the seams and went back in and looked at a couple more frames and put everything back together. They were still boiling mad and had I not had heavy gear on I'd probably have gotten stung a hundred times or so. I was able to see a virgin queen and one of the queen cells I saw was gone. I did also see a different one deeper in the hive. I know we are in a bit of a dearth and I know that that can plat a role in their temperment but this seems quite unusual for them to turn so aggressive in such a short time. Critters are not an issue as I have them inside an electric fence. I am in rural area so other than me they don't get bothered. This is also my largest and most populated hive so robbing isn't an issue. Not sure what to do here. I have kids around so I can't have an aggressive hive around if this is how they are going to be from now on.