Toddler killed in dog attack in rural NSW A two-year-old boy has been killed by a dog in the far southwestern NSW town of Deniliquin. A TWO-YEAR-OLD boy has been killed after being attacked by a dog in Deniliquin, in far southwestern NSW. He was attacked by the mastiff cross while visiting relatives early on Sunday afternoon, police say. Authorities caught the dog and put it down on Sunday night.