Electric dog fences

Some things to keep in mind when choosing a pet containment system:

Lightning protection

Both wired and wireless pet containment systems operate through the generation of electric fields - wired systems, from the antenna or ground wire; wireless systems, from the transmitter. Because the system is powered by your home's AC current, it can be vulnerable to power surges. A surge protector may protect your system from problems emanating from your power company, but it will not protect it from lightning or even a buildup of static electricity in the atmosphere during a storm. A lightning protection module is a good investment if your system fails.

If the power to your system's transmitter fails altogether, you need a battery back-up power source to keep the system operational.

A wired system operates in a closed loop. If the loop (or wire) breaks, the system fails.
An audible line break warning clearly alerts you to a problem. To locate the disruption in the ground wire, an "RF choke" device that is available at most electronics stores can be installed. Once you've installed this device, you can use a simple AM radio to find the problem and fix it.

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