I have been getting information on a product called snake away, and as long as you put it on the outside of the fence and your dogs can not get to it they will be fine. also you can use moth balls (they smell loud though, the snake away smells like moth balls) and sulfur if you can stand the smell of it. a friend was telling me about soaking ropes in something the other day and laying them outside the fence. i'll have to check with her again on that one.
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