[WillowTheWhisp]

You may well be right Steeljack. Probably not the exact same chips as for lost dogs then but there are things that can give out an inaudible signal to a device that's seeking them aren't there?

I mean an ankle band wouldn't work anyway if you had someone like my friend's father because he'd just take it off. It would have to be less obtrusive and more permanent in nature than that.