Calm Your Horse with supplements for Horses. Calm and Cool as well as other products that will assist in keeping your horse calm for different situations. Horses get nervous just like people. Maybe it is their first trailer ride or first time at the show grounds. Horses do not like visits from the vet anymore than people like going to the doctor. Products like Calm and Cool can assist during times of stress and they do it with natural ingredients. Shop Horse Tack International for calming horse products.