Originally Posted by Gempress
From the wording of the article, it looks like the dogs are kept caged in the day and given free roam between the fences at night. Honestly, if that's the route the prison wants to go, I'd go with a genuine animal deterrent. Heck, turn loose a pride of lions during the night and call it done. They'd probably be far more effective than any wolfdog, if only psychologically.
ETA: What about alligators? It's Louisiana, surely there are plenty of those around!
Heck, put a flock of nasty-tempered geese out there - no one would be able to sneak through.