Ok, thanks for the info. Now to narrow it down.
Dearth - 3 other hives in the same location are laying very well and this would not be considered a dearth time of the year normally.
Drought - We were in a bit of slow rain for a bit but it is been quite a bit for several weeks now.
Backfilled brood area - This may be a possibility. They have definately filled some of the brood area with pollen and honey but not all of it and I would think there is still enough room to lay. I could put in a few empty frames to make sure.
Virgin queen - I know the 2nd queen was laying well in a nuc, the 1st queen should have come from a nuc as well but could be a dud I guess???
Exhausted queen - Both of the queens are young (new).
No queen - I suppose a possibility.
Regarding the type of queen. The queen that was replaced was a young queen (1 month old) from a swarm cell. She was laying well. This hive was very agressive and I was planning to replace the mother that swarmed the same week they swarmed. The mother and daughter were "wild" mated queen here in FL where africanized drones are a resonable likelyhood. Following the Florida best management practices, I replaced both the mother (since I caught the swarm) and the daugther. The daughter hive is the problem hive.
The 1st queen I tried to replace with was a queen from
http://www.geocities.com/fatbeeman/?200524 (Dixie Bee Supply / Fatbeeman) out of Georgia. He is known to produce gentle queens and I need that considering the location they are in. Anyway, the queens I got from him were supposed to be Italian. The 2nd queen I purchased was a Russian.
So who knows. I guess I will take another look this weekend and see what I can find. This is a big hive for me (1 brood & 3 med) and lots and lots of foraging bees since there is not much brood to care for. Also, since I have not yet had a gentle queen in there, all the bees remaining are from the mother or daughter and they are not any fun to work.