This has already been discussed here: An anti-bark collar is not an electronic fence collar. And nothing in the article suggests either the electronic fence or the electronic collar was malfunctioning. If you read the article you will note that in 2015 his anti-bark collar had a dead battery, which lead to him barking at somebody and so the original complaint. 

That has nothing to do with an electronic fence collar in 2016. The collars that go with electronic fences normally are NOT anti-bark and for good reason -- you don't want the dog confused over whether he is getting shocked because he is close to the boundary or because he is barking. I know because I have both collars for my dogs and I need to choose which one they wear.

Yes indeed he was barking because he did not have his bark collar on. He had his electronic fence collar on. And if you shoot an animal running he will continue moving for a short period of time, hence why dog was half out of his yard.