Sentry Health Care Good Behavior Pheromone Collar mimics the pheromone that the mother dog produces to calm and assure her puppies.

A convenient alternative to pheromone diffusers - the collar goes where your dog goes!

Proven to modify behavior for problems such as separation anxiety, excessive barking, destructive behavior, and inappropriate marking.

For dogs and puppies with necks up to 28 inches (adjusts down for smaller neck sizes).