The chickens have been happy with their work, and their eggs should be super high protein!
The water leak was found, but it took until the end of the first day.
Once found, it was apparent why we couldn't find a wet area once we saw where the drip was. This is underneath the storm water drain. It is a ceramic pipe and it is surrounded with rock. The leak just trickled underneath the pipe in the rock base and disappeared somewhere down into a spring or stream eventually. It explains why we never saw any wet areas in the yard.
It took a couple tries to get the new hose attached but two days later, there is no more drip.
Now onto the next part of this mess...