What these breeds have in common
The Herding Group holds the breeds that move livestock: Border Collies, Australian Shepherds, Rough and Smooth Collies, German Shepherds, Pembroke and Cardigan Welsh Corgis, Shetland Sheepdogs, Old English Sheepdogs and the Belgian breeds.
Unlike the Hound Group, this one is genuinely predictive. These dogs were bred to work outdoors in weather for long hours, and almost all of them carry a double coat built for exactly that: a dense insulating undercoat with a weather-resistant top coat over it.
They are not clipped, they blow coat twice a year, and the mats form in the same three places on nearly every one of them.
What this group means for grooming
Weather-resistant double coats built to sit outdoors. Never clipped down, and the undercoat behind the ears mats first.
What actually decides the grooming
The coat type, not the group. It sets the tools, the interval and the price, and two dogs in this group can need completely different appointments.