As most of you know I work for a railroad as a thru freight Engineer. When I was a conductor, at any time I would be required to walk the length of the train which could be as long as 9000' and in some of the most rural area of the country. It wasn't unusual to walk up on any kind of wildlife including feral dogs. One of our solutions to deal with most any kind of threat was Road Flares. Of course the ones we have are industrial strength and last for 10 minutes, but I would expect that most flares would do the trick. Pop a flare off in anythings face and they will run for greener pastors. You do have to keep in mind that during fall/winter seasons this can and will start a forest fire if not careful. As we are not allowed to carry anything larger than a 3" pocket knife and a walking stick/staff is too big to carry on and off each train, these are great as we can stick a few in our back pocket.
Cutter