Older pets and younger babies, dogs with little body fat and those with single coats are all more susceptible to cold weather issues. (nehumanesociety.org)
Unlike single coated breeds, who have hair that just keeps growing, double coats grow to a certain length and don't get any longer. (dogsnaturallymagazine.com)
The short single coat has hairs that are a light blue at the roots, then deepen, ending in a silver tip, producing a halo effect. (cattime.com)