Depending on their activity level and lifestyle, Australian Shepherds generally need a bath every 6 to 8 weeks. Their thick, double coats stay relatively clean and only need bathing when dirty, as they can become dry with excessive washing. Weekly brushing is recommended for Aussies to manage coat shedding and remove dirt and mats. In the winter, or if they are less active, they can go up to 2 to 3 months between baths. Find dog shampoo for Australian Shepherds at Lillian Ruff.