I have a doggie door for Sahara and it has been great so far, Knock On Wood, haha!!!!! I have underground electric fencing and I feel secure that she will not cross it. She has been shocked testing it a few times, but not lately. She stays in and out, and there are days that she stays outside alot, depending if my hubby is home working in the yard. I work days and my hubby works nights, but sometimes he is busy and leaves the house for a few hours. I do wonder when I come home what I would do if she was not here, but I see that sweet face laying in the driveway waiting patiently for me to come home.