Serene UM Calm relaxes dogs & cats from 1 to 20kg & helps combat aggression, separation anxiety, hyperactivity, travel or car sickness, excessive barking, noise phobias & is perfect for times when fireworks are around. Serene-UM is the perfect, natural answer to calming hyperactive pets or those who stress easily. It is beneficial with helping your pet cope during "unsettling periods" like fireworks, thunderstorms, car journeys & family gatherings. Serene-UM consists of a totally natural blend of amino acids & vitamins, which helps to relax your pet & thus offers you a natural alternative.