As leaders, we can teach our horses to deal with anxiety caused by other horses or their environment. What they learn is to release tension under pressure and focus or follow our direction and energy. Throughout this, they build confidence and an ability to deal with high levels of pressure. Thus, their herd problems decrease or disappear entirely, while at the same time their trust in you increases exponentially.
Your emotional health affects your horse. Is your horse a challenging horse which you feed into this challenge state of mind? Start with yourself. Check in with your emotional state, observe your horse recognize the change you make. Pay attention to the small things.