I am so very pleased with my purchase of the Anti Barking Dog Collar from The Dog Line and their efficient service. Although it was the week before Christmas, they despatched my order immediately via Express Post, kept me up to date with Tracking. I was very pleased that the Anti Barking dog collar arrived Christmas Eve!! My German Short Haired Pointer (aged 10 years) hears noises in the night and barks at any sound. The Anti Dog Barking Collar works very well without upsetting my dog in any way...she is much calmer now. Thankyou so very much for your input and advice in aiding me to purchase this Anti Dog Barking Collar..You have my top recommendation.