Dogs with long and curly coats should be brushed daily or every other day, while dogs with double coats should be brushed one to two times a week. (crittersitca.com)
Undercoat rake: Designed for dogs with double coats. (petcaretools.com)
However, when they must be outside during cold weather, healthy larger dogs with double coats can be comfortable and safe, provided they have adequate protection from wind, snow, and rain. (articles.extension.org)