Growing up on a farm I've been zapped by electric fences more times then I can shake a stick at. I even got tangled up hopping through one once and was stuck there on the ground for at least a full minute with it buzzing me. While I can't say for certain I don't think it's done me any permament harm. It won't hurt your dogs either.
My thinking though is that it's only a matter of time till your dogs learn to dig under the wire too. Have you considered the underground wires that work with a shock collar.
My thinking though is that it's only a matter of time till your dogs learn to dig under the wire too. Have you considered the underground wires that work with a shock collar.