I wouldn't worry about danger of electric wire and it doesn't have to kill animals, it just unsettles them to the point - they don't want that sensation again.
We had electric fencing all over the farm when I was growing up. However, it wasn't for predator protection but to keep horses, cattle...
It has never happened till it happens. My family has raised chickens for well over 100 years here. We never encountered mink until mink killed about $4,000 worth of birds in a week.
Daytime predators include dogs, coyotes and fox as well as occasionally raccoons. Any of them can rip chicken wire...