All of the following are responsibilities for trained volunteers EXCEPT:

Trained volunteers play a crucial role in therapeutic riding programs, assisting instructors and ensuring the safety and well-being of the riders and the equines involved. While volunteers often engage in many supportive tasks, certain responsibilities require specialized training and knowledge to ensure proper execution and the safety of both the riders and the animals.

The correct answer indicates that a soundness check is typically not a responsibility assigned to trained volunteers. A soundness check involves assessing the physical condition and health of the equine to determine if it is fit for riding and work. This task requires an understanding of equine anatomy and physiology, as well as experience in identifying potential health issues. Therefore, it is generally reserved for licensed equine professionals such as veterinarians or trained equine specialists, who have the requisite expertise to make informed assessments about an animal's fitness for work.

In contrast, the other responsibilities listed—physical warm-up, mounting and dismounting, and cooling off equines—can be part of a trained volunteer's role. Volunteers may assist with physical warm-ups by leading the horse in gentle movements or walking with the riders to help prepare them for the session. Mounting and dismounting, which entail helping the rider safely get on and off the horse, can also be