I've been noticing something in my new nucs I am making up. I put the queen in the nuc and a frame or 2 of larva. Maybe a frame of drawn comb and a couple frames of foundation. Then I feed them some 1 to 1 syrup. Whats happeneing is they are filling what little space the have with the syrup and not drawing out the frames. This doesn't leave the queen any space to lay and they start build swarm cells. I've had happen about 3 times already. They are not supersedure cells, they are building them on the bottoms of the frame. How do I feed them and get them to draw comb without filling the existing comb with the syrup. I'm having to split splits.