McChooky
Free Ranging
I was about to recommend a motion activated sprinkler when I read your post. I installed an electric fence last summer after reading a lot of articles and watching videos but it still quit working last fall .Theres a lot more to installing an electric fence than a sprinklerThere is a sprinkler jet unit you can buy that is motion activated, meant to spray at deer and rabbits to keep them out of gardens.
Alternatively, some hot wire installed low to the ground.