It looks like the kid got his ear got on the fence and “grandma” is blaming it on the dog. Per the comments in the below article, police found no blood or any sign of evidence that the golden attacked.
http://www.wtkr.com/news/wtkr-dog-ear-bite,0,4558504.story
“Police are not sure what dog is responsible for biting Christopher on his left ear, but his grandmother says it’s a golden retriever that belongs to one of the other neighbors.”
The grandmother also said the boy had bites on his arm and shoulder, and that the dog had jumped the fence to attack him. It also said the son saw the dog with the kid, as they were all playing in the same yard. I sincerely hope they haven’t found a way to make fences bite children, so logic has me believing it was just a dogbite.