Sorta on the same topic--I have a friend who says he had a friend who used a dog whistle when being chased by dogs. I've ordered one. Anybody have any experience with those? I thought that would be great to hang around my neck and just blow like mad when the dogs head after me. My experience with Halt is that the dogs around here seem to have figured out just how far to stay away from the stream. I also had one dog that I got right in the face with Halt, and it never even fazed him.