There are two kinds of fences that will keep the pet in your backyard: a high frequency electric fence and guard rail. Both fences are effective at keeping the animals from roaming, and will not harm animals. Electric fences emit a small electric shock collar animals wearing when they walked past the property boundary line. Finally, the pet learns where the boundaries which is not to go outside, risking annoying reminder shock. This type of electric fence is very popular and easy to install. Only animals wear special collars will be shocked. This means that people can walk through the fence and not be harmed in any way.They not even know what's out there. Electric pet fences are popular with people who have small dogs and cats. Many times, these pets they want to roam around the yard. Small dogs, however, will try to leave the yard in particular to explore the sounds. Small animals can be put into dangerous situations when they leave their yards. Dogs can sometimes lose and will wander around the neighborhood until (hopefully) find their way home. Electric pet fences to provide security for its people want pets. If people work all day...