Where are you located. I had a hive to swarm this spring and no queen cell was found. I went to the guy I usually get queens from. We checked all his queen boxes and none had a good laying queen. With the weather we had this spring we figured it was raining when it was time for their maiden flight, and didn't get bred. He gave me an old queen to put in the hive. I installed her, in the cage, into the hive. Checked in a few days, she was not in the cage. Didn't find her, still had no brood, in a week or so started looking for another queen. Seems the other queen breeders were having the same luck. A week or so latter I caught a swarm, was going to try to paper combine them. Went out to the hive to put paper on top, checked hive one more time, there was worker brood on several frames. It isn't the queen that my buddy gave me, or no paint now. But if you don't have one you need a queen, and like Jim said beetles and moths can sense a weak hive. Good luck, hope you can save them.