The Sentry Calming Collar is a pheromone-infused collar designed to help modify stress-related behavior in dogs. The collar is made for dogs of all sizes and ages and is easy to apply. It can be worn for up to 24 hours and can help with separation anxiety, noise phobia, and inappropriate marking. The collar contains a blend of pheromones that mimic the natural calming pheromones produced by dogs.

UP TO 23 inch neck