I have a couple of hives started from packages this spring - they were slow coming on so I didn't take any honey from them. They have been medicated and treated. One hive is a deep & a medium - the other is 3 mediums. I went in to remove strips and the hives are stuffed top to bottom with bees on capped honey & syrup. The queens barely have room to lay and as far as I can tell there isn't much stored pollen. The outside top frames are still mostly unworked foundation. Is a late swarm a valid concern? Can I add a super for space now and take it away in a month or so? I don't have drawn comb to give them and the temps are beginning to go below freezing here at night - just east of Seattle. I welcome advice (& opinions). Thanks.