Which behavior is NOT desirable from a handler while managing a horse?

A handler's demeanor is crucial for the safety and well-being of both the horse and the handler. A calm manner helps to create a secure and relaxed environment for the horse, which can reduce anxiety and promote better behavior. Horses are sensitive animals that can pick up on the emotions and energy levels of those around them; thus, a gentle and steady approach is often more effective.

Talking quietly to the horse reinforces a sense of trust and reassurance. It can help to soothe the horse and makes it easier for the horse to respond positively to commands or cues from the handler. Additionally, facing the horse demonstrates attentiveness and respect and allows for better communication, as the handler can monitor the horse's body language more effectively.

In contrast, shouting disrupts this positive environment and can cause stress or fear in the horse, leading to undesirable behaviors and potentially dangerous situations for both the handler and the horse. Hence, shouting is not a desirable behavior from a handler when managing a horse.