Dog Shed Before Winter. Just before the cold season kicks in and days gets shorter, your dog will shed the lighter, summer coat and get prepared for the ticker, more protective winter coat. For dog’s who shed often, it is important to brush them.
Dogs develop and then shed winter coats in respond to changes in the weather. Indoor dogs, even of breeds that normally shed twice a year, may not shed all that much in the spring. Since he won't experience the shorter daylight hours of winter or long summer days, they won't serve as a trigger for shedding or growth.