I would like a GPS collar as a safety net and way to provide peace of mind for me without constantly calling the dog (like the ones used by hunters). It needs to work offline, though, since the internet connection is rather poor around the farm. I'd also like it not to be extremely expensive. I know this is a lot, and perhaps unrealistic- but does anyone know if something like that exists? Also, does anyone have experience using a GPS collar/tag that could share about their experience? Do you think that a GPS is overkill and unnecessary for a trained dog?