I've heard a lot of the drivers in my building talking about their past dog incidents as well as many on this forum. I looked at a few past posts that mentioned several solutions. 1. Dog Cookies 2. DIAD 3. Dog Spray, Pepper Spray, other types of sprays 4. Mini air horn I searched the internet a little and found these two devices. I was wondering if anyone has used them, the second model is relatively cheap. They are ultrasonic devices that can be attached to a belt. They are above human hearing. Much easier to carry around than dog cookies, no damage to the newer DIAD versions that are lighter and more breakable. No backfire from sprays on a windy day. No annoyance of the air horn to everyone within a mile radius. I understand that you are paying hard earned bucks for this, but think of it as an investment for your safety.