Mine will be 6 years old this year. I've never requeened, never treated it. The original queen is a bweaver. I'm sure they have swarmed a few times and or superceded the queen at some point. They are my best producers every year and have always been very gentle. I checked on them this past weekend and they were flying all around and bring in pollen getting ready for year #6. I have another one turning 5yrs old and 2 turning 4 this year.