My dog Dexter is a Cairn terrier about 18 months old. In an attempt to work off Dexter's puppy energy, I began using a laser light for play. Dexter loved chasing the light - all around the room up and down the stairs. Unfortunately Dexter transferred his play activity to a fixation on lights and shadows. He would bark insistently at any shadow or light reflection on the wall, floor or ceiling. He exhibited this behavior outside during walks also as he would fixate and bark constantly at his own shadow, my shadow or any shadow from any person, plant or object. Dexter's behavior was so extremely disruptive that I was on the verge of finding a new home for him.---I spoke with my vet about Dexter's behavior and she recommended Bark Busters. James came to my home, talked with me and showed me the proper way to handle Dexter. The results were incredible! By the end of our session, I was the "alpha" and Dexter was a well mannered puppy.---A shadow will still occasionally catch his attention, but I now know how to correct him. Barking is at a minimum and walking outside with him is a pleasure versus a chore.