Question for dog owners. Do you have a dog that's a runner? I mean an active breed that is prone to jumping a fence, running away, etc? I ask because I wonder if this indicates an underlying problem? Does a fence (or some other kind of enclosure) solve the problem or is it more complicated than that? It would seem to me that yes, a fence could keep a dog in, but maybe they might be forever "bothered" by the fact that they can't be free (which could result in other destructive behaviors)? Thanks for any insight.