We're giving 16 lucky readers each two bottles of Serene-UM that helps pets to stay calm through stressful events, without sedating or impairing learning systems in the brain. It works to produce more of the mood-stabilising substance called serotonin, which reduces anxiety. Serene-UM is the natural answer to calming hyperactive or anxious pets. It’s available in drop formula which can be mixed with the pet’s food.