Zombies vs. Alligators - Perimeter Security

I saw this in Mexico and it is a great play on an old security concept, the moat. In this tip you will be building a moat around your house or a very least across the front side.  In Mexico at this little resort they added a new twist which is brilliant. They posted signs warning of alligators in the water. I don't think they actually had alligators but I'd bet money that anyone considering a swim through the moat to get in the resort would change their mind! In the case of zombies that can't read you will need hungry alligators to eat the zombies as they cross. One has to wonder if a zombie bites one of your alligators will you have zombie alligators that don't require regular feeding?