tdub4 -
We definitely have a hawk around - my son created a network of baling twine from a very tall pole in the middle of the pen out to fence posts on the sides - looks like a cross between a circus tent and a spider's web. Very swamp yankee
So far it seems to have worked well, haven't seen the hawk really think hard about it yet. Our multitude of roosters (most going into pot this weekend I hope) all make sure everyone gets under the house when the hawk's around.
We have lots of deer - they go near the chickens

- and groundhogs, rabbits and skunks. I've only seen a fox once, on the trail cam, far from the house. We have once had raccoon prints on the garbage can (happily unsuccessful ones), but nobody has been spreading the compost pile around. Lots of our closer little critters have moved out since we got our dog. She's out much of the day and loves her chickens and the snow. So I'm really hoping that we don't have a problem. I know that there are many things unseen lurking in the woods though. Was treated to a coyote chorus last night (once every 4 months or so).
Most of the farmers we know around here keep the chickens out in the pasture in the summer and then park the tractor in the barn during the winter. We had one family close to us who didn't even use electric fence. They have since moved about 7 miles away, kept the same arrangement (tractor out in field, no electric net) and then lost all their hens, one by one to a very bold fox who would make off with them within sight and shouting distance of people. There are a couple roosters left who now hang around the barns - smart ones
But thank you for the warning. I will keep the heads up around the yard as we move into the new situation. I will even keep the electric fence around the whole shebang until the snow gets going. I am considering putting up a single electric wire somehow, but not sure how to do it - need to remind myself what winter looks like where the chickens are parked.
Take care and enjoy the fall - when you say North of Syr I assume you will be drowning in snow!