I'm new at this. Captured a swarm in early April, put them in my homemade langstroth 10 with no drawn comb. They did fine, good queen, good brood, growing steadily but slowly. I feed them on and off with a front feeder which was not there for a few days and the entrance was about half blocked. Suddenly I checked them and saw 50 or so dead bees laying in front of the hive and I figured they exterminated some robbers. I put the feeder back on and reduced the entrance hole to about one inch. Now they are fine, trucking in lots of pollen and nectar again. I saw the bouncers jumping a few remaining bad guys and dragging a few out. So, when bees fight how do they kill, by stinging? Does that mean that 25 of the dead are mine and 25 are bad guys? I saw one pair of dead bees with the stinger of one stuck in the thorax of another. Many wounded bees wander around aimlessly until they die or the ants get them. Now the reduced entrance is blocked by 3 or 4 bouncers doing aggressive card checks. Anyway, my gals apparently got busy, so all appears well.