Peppermint helps support the digestion system, aiding in nausea and digestive upset, also has a very cooling effect. Ginger supports the digestive system by toning the muscles in the intestines and stimulating the breakdown of food particles. Lemongrass has a cleansing effect that will appeal to your horse., also helps relieve muscle spasms. Spearmint helps with fussy eaters, it relaxes the muscles in the digestive tract, calms the stomach and can help aid in the digestion of the hindgut. Patchouli supports a healthy digestive system and soothes occassional queasiness. It's also calming and relaxing.