(Sergeant's) Provide comfort and calming sensations wherever your dog goes. The pheromones in the Good Behavior collar mimic the natural pheromones emitted by lactating mother dogs to reassure and calm their puppies. Dogs recognize these pheromones throughout their life as a source of comfort. The natural calming response can now manage pet behaviors associated with anxiety, fear, stress or phobia. Activated by the dog's body heat, pheromones are released over 4 weeks.