I have heated waterers for my flock, but I am wondering if there is something that I can use that will stop the Fermented Feed from turning into a block of ice. Food and Water is in the run, and the girls won't be outside when I leave for work, so the fermented feed will be out for an hour or so before they wake up. Has anyone tried using a heated dog bowl? Would the metal base that goes under and unheated waterer work? Creative suggestions would be welcome!