One year beek here. Done a walk by inspection of my six hives today. I noticed a little fighting at the front of one of them. When I took a closer look expecting robbing, I saw it was one of the girl harassing a drone. I saw three different drones in about a minute drug over the side. Is this normal this time of the year? I thought this did not happen until cold weather. I have not harvested any honey off of this hive,being it is a one year old, build up hive. So they have plenty of stores. I did not see this activity on any other hive. Is this normal? Any suggestion will be appreciated. Thanks