Beaphar Calming Collar for Dogs effectively calms and helps to reduce problem behaviour, such as excessive barking, destructive behaviour and inappropriate urine marking in the home. Containing the natural herbs valerian and lavender, which are often used in human healthcare to manage stress, it leaves dogs feeling calm, settled, relaxed and reduces problem behaviour. This can be especially important in a multi-pet household. Once fitted the collar works quickly, and will be effective within one hour after application. The collar will be effective for up to six weeks, meaning it is ideal for dogs that frequently travel to the vets or kennels, during firework displays and the party season, or for those that generally seem unsettled. Suitable for dogs from 12 weeks of age.