About two weeks ago I noticed that one of my hives had no eggs and no brood. Upon inspection, I noticed that there was very little space in the brood box for the queen to lay. When I found the queen, the few cells that she could lay an egg in looked like she was rejecting them. I actually saw her put her rear in a cell and then walk away--maybe she is out of eggs, although I don't believe she is very old. I moved two frames from another have with eggs and brood to that hive. I checked it again last Saturday and found the queen again, some brood but I could not find any eggs. On this last Wednesday I found the queen again, some brood(but very little) and no eggs. Yesterday, I could not fiind the queen and found no eggs. I was going to kill her and try to put another frame of brood from another hive, but since I can't find her I don't know if she is dead. If she is not dead, maybe the hive will still feel she is ok and won't raise a new queen. Furthermore, I can't find any queens for sale. Should I put brood frames in there without finding her, should I put them with another hive, or what? Please advise as I am not that good at this as of yet. If anyone knows where I can get a queen, that would be helpul as well. Thanks.