We loved out bees. With the exception of one new hive we brought home, all of them were very calm and not aggressive at all.
We had to burn the new hive. We made the mistake of not checking the hive internally before bringing it home. We had them several days before Cliff had the chance to open the hive up.
As soon as he took the lid off he knew something wasn't right. It had a terrible odor. He called the county inspector to come check it out. Sure enough it was a diseased hive, that is probably why they were aggressive.
We medicated out other hives just to make sure they stayed healthy. Lesson learned.