Bee, after starting to use the FF the last 4 weeks and liking the results to this point I have to ask
why not make your FF in the house this winter,,,feed what they will cleanup and supplement if necessary with regular dry feed?
I'm in a much colder area and don't use any supplemental heat in the coops,,,just warm bodies. My thinking is that taking the FF from a warm basement and giving them a morning feeding along with a refill before dark the birds will have something warm to start and end the day. My dry feed will be at ambient temperature,,,that could be -30º any given day.
This would also keep the benefits (discussed often) going at a steady rate all winter. I'm actually considering using a second heated base in the coop that would be just for the FF pan. There is no free range forage here Dec-March last winter I added sprouts and increased greens with alfalfa meal (expensive this year)
I guess I am at a loss to understand your reasoning even with your explaination,,,,,
I'm feeding out around 8lbs a day to 50 birds right now,,,still feeding out 8 roosters 6 will be getting culled soon