What does the term 'saddlery' refer to?

The term 'saddlery' specifically refers to the equipment used for riding and caring for horses, including saddles, bridles, harnesses, and other related gear. This collection of equipment is essential for safely and effectively riding a horse as well as for ensuring the animal's comfort and well-being during various equestrian activities. Understanding saddlery is important for maintaining the horse's health and training regime, as proper equipment contributes to both rider safety and horse care.

The other options describe different aspects of horse care and management but do not pertain to saddlery directly. The diet plan for horses is related to nutrition, the location where horses are kept refers to stabling or housing, and health checks involve veterinary care and assessments. Each of these topics is crucial to overall horse ownership and management, but none define the term 'saddlery.'