It has warmed to a balmy 18 deg F (7 C below zero). Most birds have the sense to fly south for the winter. Not so apparently with the doves.
But at least they finally seemed to discover their new coop/feeder.
Currently still in its experimental stage and I will make a more permanent arrangement if they actually continue to use it. When I first put it up they did not even notice it and did not go to it despite the bird seed I put in it. I had to take it down and set it at ground level to get them used to it. Then gradually raise it higher, thus the blocks and milk crates.