Pictures are helpful!
If you are using 'regular' foundation, that is "worker-bee" sized. Bees want to also raise drones, so they may build drone sized 'bridge' comb between boxes to raise drones. If you prefer to discourage that bridge comb, giving them a 'drone' frame or a foundationless frame may help.
If you are using 'regular' foundation, that is "worker-bee" sized. Bees want to also raise drones, so they may build drone sized 'bridge' comb between boxes to raise drones. If you prefer to discourage that bridge comb, giving them a 'drone' frame or a foundationless frame may help.