Guys, Thanks for the recipe's and baits.

Greg, I'm at a loss as to what else could cause it. Cows are gone, it hasn't rained, no other fish but bass and bluegill, and it has never before been a problem on this water hole.

Here's what is causing my thinking. I have a backgound in computer programming and managing Information Systems. Anytime something acted differently, we looked at the last change we had made to the programs that affected the system. In 99% of the instances, it was something we had introduced without adequate testing or enough knowledge. I'm looking at the pond environment as a "system" or body that now contains a bug or virus of some kind. Something has changed that is causing stuff from the bottom of the system to suspend. Dirt is heavier than water and I am at a loss to identify anything else. No other neighboring ponds in the area are similarly afflicted.