Sep 14, 2017 · Detecting changes in your dog’s bark or voice is relatively easy. While delighting in his happy greeting when you return home, use a discerning ear to listen to his voice with care. Make sure that you’re alert to any changes in timber, volume, and overall sound, particularly when breathing is strained. If you do notice changes, don’t .... Furbo also lets you see how often your dog really is barking, since it alerts you each time it happens. The technology ensures ambient and background noises are filtered out so you get alerts when your dog is barking — not when other noises are being made. Best of all, you can turn the alerts on or turn off as needed.