* 636.1: This is the general category for horses and other equines, including breeding, care, and management.
* 599.73: This covers mammals in general, including horses, from a biological perspective.
* 798.2: This covers equestrian sports like horse riding and racing.
* 306.46: This category covers social aspects related to horses, like their role in history, culture, and society.
To find books about horses, you would need to look for books under these general categories, and then use the specific Dewey Decimal numbers within those categories to narrow down your search.
For example, a book about horse breeding might be located under 636.1, while a book about the history of horses in warfare could be located under 306.46.