The dramatic seasonal shedding event in double-coated breeds where the entire undercoat releases over 2–4 weeks. Fur comes out in clumps and tufts rather than individual hairs.
The highest-grooming-demand period for Huskies, Samoyeds, German Shepherds, and Golden Retrievers. Failure to remove blown coat causes severe matting.
Schedule a professional deshedding treatment at the start of coat blow season — it removes weeks of loose fur in one session.