Hormonal Mares- To nutritionally help support mares prone to hormonal temperament problems. Cushing's - Chaste Tree provides nutritional support to the pituitary gland and whole endocrine system working alongside the body in its self-regulation. Male moodiness - Aggressive Rigs and Stallions have also been addressed successfully with this herb. Laminitis- The Laminitis Trust has conducted research which shows the value of using agnus castus.