Does your dog respond really well to your voice? My parents once bought this thing that worked like an invisible fence, but instead of shocking the dog when it went passed a certain point - it would play a loud recording of your voice saying whatever you wanted it to say. So you could have it say something like "Mimi! Get back here!" or something like that.
It would only work if she responds well to your voice though. Also it of course wouldn't replace you being out there with her or anything.
__________________ Wrigley (1 year)  Rainer (4 years)  |