An undercoat rake is a grooming tool designed specifically for pets with thick or double coats, such as Golden Retrievers and Siberian Huskies. It features long, widely spaced teeth that penetrate the topcoat to remove loose undercoat fur, helping to reduce shedding and prevent matting. Using an undercoat rake regularly can improve your pet's coat health by promoting better air circulation and skin condition. It is essential to use the rake gently to avoid irritating the skin, and it is best to groom your pet in a calm environment to make the experience enjoyable for both the pet and the owner.