-27 degrees F is Fffflipping cold. We had that a few years ago. I had my nieces over and the furnace ran out of fuel at 11pm. Lovely. I had no idea it would be that cold, but I couldn't open and shut the door a bajillion times to let everyone in, with some of them going in and out of doggy doors. So I left most of them out. I slept with Babsy and the kids slept with Cujo2. I put an electric radiator next to the toilet and by the kitchen sink in hopes that the pipes wouldn't freeze. We all went to bed.
The next day the news said it went down to -27 F. The dogs all have appropriately sized houses with straw in them. And they were all fine. The kids survived too. The idea of GSDs not being able to take 40-50 degree temperatures, I don't know. What concerns me with the southern US, is that the dog might have trouble with the warm temperatures. I generally bring my dogs in and crate them at night when it is below 0 degrees F. While I am at work though, they are out there, thus the dog houses and straw.
Heidi Ho, Odie
Joy-Joy, Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Quinn (The Werewolf), Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.