ProKalm from Science Supplements is an innovative product which helps to manage stress and anxiety in horses. Behaviour such as bolting, pulling, spooking, wind sucking, crib biting, box walking, stamping and poor concentration can lead to a greater chance of infections, gastric ulceration, loss of condition and poor recovery from exercise and competition as well as loss of performance. ProKalm is best given in feed on a regular basis. The effects of a single quantity can begin within 30 minutes and last for up to 8 hours. The amount given can be varied to get the desired effect. Some horses require higher quantities than others.