I would like to apologise on behalf of the wankers on this forum that just post a load of shit most of the time,and I hope the dog is ok,it can mess up some dogs,but if you give it a bit of a lay off for a while it should help to get the juices flowing again when he gets out again.Mine have both hit fences in the past as there are a lot of them over here,and they certainly don't like goiung too near them now,but they still work ok............good luck mate.
Martin