I was born and raised in northern Minnesota, reading this post and specially you folks who have had snow fall already...reminds me to well why I live here in Georgia...we do not have mosquitoes, deer flies, few sunny days, -45 degree days and top it off with multiple feet of snow.
I get a few days each year with snow, but do not shovel or drive and our fall weather runs into December.
However it can get cold and the south needs it to kill a few bugs that won't survive with freezing temps. This will be the first winter with birds and it sounds like the heated pet dish might be my answer, however the 200 feet to the coop presents it's own problem and carrying water every day for them is not an option...anyway you could keep the water flowing would minimize it freezing? Solar would be nice if it wasn't expensive. I really can't believe people are worrying about freezing water bowls this early....but I read to learn and thanks for posting this thread.