I found The Dog Line website very easy to use. The information was very informative and helpful. My dog, Harry. has a very high pitched, ear piercing screech that comes into play, to name a few examples, every time the door bell rings, when visitors arrive, when I go to feed the cat and as I leave the house. I had tried different procedures to no avail and his behaviour was destroying our relationship. Thank goodness for 'The Dog Line' for my purchase of a 'PetSafe Ultrasonic Indoor Bark Control' is proving to be something of a godsend as there has been a considered reduction of the screeching. To top it off a day ago there was one instance of no screeching at all. Wonderful!