We have a hive that just is not building up. They take no syrup while the packages we installed have gone through gallons. They are staying on about three frames, and there is not much activity at the entrance to the hive. They are in there, as is the queen. I have seen her on each inspection (the last about a week ago). This is a hive that survived the winter, but they simply are not building up. I have not checked in the last week, but the last time saw little brood and no eggs. I must admit, however, that I am no expert at spotting eggs and cannot say that I have ever seen eggs in our hives; this is a skill I must work to develop.
So, do I let them go and see what happens or is it time to put in a new queen. If I put in a queen now, it will be almost like a package (although I think there are fewer bees than are in a package). Your collective advice is appreciated.