if a pet bit a child and it was unprovoked then yes, it should be put down, but part of the reason that children should not be left alone with pets is because sometimes children "test the dog's tolerance" by doing things such as shutting their heads in drawers (see above). i read one story where an alsation was put down. Previously having been a model dog, the vet did a autopsy on it to see if there was something wrong. the dog had a wax crayon lodged in his inner ear canal, something the child had done which would have caused the dog great pain, and hence the dog bit the child. Had the vet not done the autopsy no one would have been any the wiser why the dog bit. I once caught one of my nephews testing how far he could bend my dogs paw the wrong way. not everything is as black and white when it comes to dog's biting. Also, my other dog got funny with my nephew and then someone fess'd up that my darling nephew had whacked her over the head with half a house brick. He was a toddler and didn't know any better, but it was a good few weeks before the dog trusted him again. Hope your staffy finds a good home.