I have walked for a couple of years with no dog 'protection'. More than one dog has followed me home. None of these canine acquaintances indicated that they wanted to do me bodily harm. A couple months ago a dog was dropped off in our village and he didn't bother me. But when the neighbor 'adopted' him and he had a home, he has tried more than once to have me for supper (well, breakfast). He tries to nip people of our community who walk to church. The owners have been told about the problem, but nothing seems to change. Well, my cousins husband loaned me this gadget to try. He had just gotten it from Amazon. com and hadn't used it yet. I told him I would be his guinea pig. He dropped it by my house and the next morning I took it with me on my walk. I did my usual walk by his house and I remained as calm as possible while he came charging and barking. I aimed it at him and pushed the button and it stopped him in his tracks. I continued on and he came again....only to have his plans of harassing me thwarted again.