sorry to hear about your dogs getting bit. but a little more on the humerous side. we got a german shorthair pup 3 years ago and our backyard was finced in and had a low charge electrical wire about 4 inchesoff the ground to keep our older dog in and the puppy ran into it one day and naturally got shocked, i guess it made him mad so he bit the wire and he kept fighting with the wire for a couple of minutes untill i unplugged it. thought you might get a laugh from that and good luck wiht your dogs.