Wrong environments with dogs in are a recipe for disaster, not for me to judge, bit just passing an opinion, wether it be a staffy an Alsatian or a jack Russell if you have two young children under the age of three and a house to run, how do you give the dog the attention time, and training it needs?
I am not blaming the mother because as a kid my mother had doberman and 3 kids and I cannot recall the dog ever raising a growl in all the years we owned him, in fact as a kid I can hardly recall any serious dog bites, yet everyday now it seems to be happening, I don't think for one minute i