has anybody tried one of these? my lab found out about 2 months ago that he can clear our 6 foot fence and does so on a daily basis. i extended the front and back fences so he can't jump over them, but now he jumps over into the neigbors yard to play with their dog. i don't really want him doing that and was contemplating getting a shocker fence. he hasn't responded to any other type of discipline for doing this yet, which sucks becuase so far he has been easy to train. i have heard that shock collars don't work for some dogs, but he isn't very stubborn and is a huge wuss, so i think a small shock would deter him. i was just wondering if anybody has had any experience with one of these?
http://cgi.ebay.com/PetSafe-Big-Dog...730836922QQcategoryZ20748QQrdZ1QQcmdZViewItem
http://cgi.ebay.com/PetSafe-Big-Dog...730836922QQcategoryZ20748QQrdZ1QQcmdZViewItem