The CalmDown by KRUUSE® Post-Op Button combines collars for protection with pheromones for calming. Minimises behavioral triggers such as: Aggression and Fear. What makes the CalmDown by KRUUSE® Post-Op Button unique: -Convenient solution: Once attached - instant effect and no refill needed -Rapid impact: Placed inside the collar, the pheromones reach the nose directly -Consistent effect: 10 days of calmness wherever the animal goes and whatever it does