Which grooming tool is primarily used to massage and loosen dirt on a horse?

The curry comb is specifically designed for the purpose of massaging the horse's skin while simultaneously loosening dirt, mud, and loose hair from the coat. Its unique design features rubber or plastic teeth that effectively reach into the horse's coat, helping to stimulate the skin and promote circulation. This action not only removes debris but also aids in loosening the underlying dirt, making it easier to remove with other grooming tools.

By using a curry comb as a first step in grooming, a horse owner can ensure that the horse's coat is clean and healthy, setting the stage for subsequent grooming steps that may include using a body brush or a mane and tail brush.