Even if you have a chew-resistant wire on your power adapter, it could still be damaged when directly and repeatedly chewed on depending on your pet's size and behavior.  You can use this flexible wire guard for extra protection if you have a "problem child" that you thing may show some interest in chewing on your Super Feeder wire. This guard is split so that you can slip the power adapter cord into it from the feeder to the power adapter. This flexible tubing is 6' long.