I don't have any signs but I am thinking of adding one that says "keep gate closed."

About two weeks ago I let the dogs out and the gate was closed. Five minutes later when I checked up on them they were gone. I found them down the street playing with some kids. I *suspect* that maybe the kids opened the gate since I can't figure out any way that they could have opened it and they haven't gotten out since. I didn't accuse the kids, it could have easily been a fluke, but maybe the sign will help.