have you actually looked into the laws about keeping a pitbull? I'm just asking as I've tried getting some info on google....there's lots of info etc & most comes up with a pit bull terrier dog (is this exactly what breed it is?) as being restricted or prohibited.

I (again regardless of breed) wouldn't be keeping or hiding a dog that isn't allowed, there is a reason for something to be restricted or prohibited. Is your safety, it's your childs safety and it's the safety of the community.

Again only you can make the decision, but I would be getting all the info needed and make an informed decision.