IMHO, ALL dogs are not to be trusted, especially around young children.
They are animals, have no reasoning capabilities, don't care much than getting the next meal, and pro-creating.
They have no logic, and could go off at any point.
I own a Lab, prolly the most docile Dog on the planet. But I wouldn't trust him alone with a young child. Not that he has EVER hurt anything, just that its a dog, and could go off without ANY reason...
Just my .02 cents...