I'm a dog lover. It's sad when dogs are hurt by humans or humans are hurt by dogs. But however the human is the blame.
Because when the human bought the dog, the human trained it to be a guard dog. After the guard dog attacks intruders, it thinks that it can attack anyone it wants. So it can attack anyone that comes in it's path.
Or it might be the dogs fault. Because the dog might have been born as a killer. Some animals are born natural killers(like all big cats, etc.), but some can be born killers because god gave it to that dog.
When some people say Pittbulls are dangerous. Some aren't. My mom told me when I was a baby this couple came up with their Pittbull. I petted the Pittbull, it didn't even hurt me. All it did was kiss me. I'd say Pittbulls are trained to be killers, not born killers.
And with the child being attacked by a dog, isn't it possible to be the parent's fault? Because the parent should have heard the child's scream. The parent ignored the scream because it was a cry toddlers would make when thye'd wake up. So they ignored the scream.
There's my two cents. ^^