It happens all too frequently. And more often than not it seems to be a particular breed of dog - or its variations.
But we don't know anything about the dog's previous history, how it was trained and the police are trying to trace its former owner(s). Which, if it was chipped, shouldn't be too difficult.
And people have been commenting on other social media sites that they shouldn't have left the child alone with the dog - when we don't even know that they did. A dog can still attack a child even if its sitting with you, and inflict fatal wounds before you have time to pull it off.
But I am concerned that it is nearly always the same type of dog. I know people will say that their Staffie is a gentle creature and wouldn't harm a fly. But a Staffie, like all dogs, can be unpredictable. Like humans, they can have 'off' moments... feel unwell, irritated ( and can't communicate this to you), or just instinctively attack a small sentient being that it regards as another animal.
It's just tragic. Poor, poor child. What an awful end to such a short life. And I doubt this will be the last toddler that is killed or maimed. But I seriously don't know how it's to be prevented...