My brother brings his dog out from Boston in the fall months when he goes hunting with dad. lol lol Generally October. He has traveled with Duke on Alaska every time and Duke has never shown any distress of any kind. He is a big old Lab and not much ever bothers him anyway........
I always tell my friends if they have to travel with their dogs to fly them on Alaska. Alaska flies the dogs for the Iditarod so that actually know how to handle dogs in the weather.