I have been using a wireless fence for almost 3 years and it works great. We have the unit on the back porch andthe doghas a radius of 90 feet in all directions.

The collar gives off a beapingsound within about 10 feet of the limit and increases until the limit is reached andthe dig is zapped.Flags are set out so the dog knows exactly where he can and cannot go. He is so used to this setup he refuses to crossareas even with no collar.

He (Ranger Pete) is a 4 yr old Springer Spaniel whoalways wants to go outside,(what Springer doesn't?). That being said, I can only speak for my dog. He is intact, a dominate male, about as active as you would imagine, especially considering he is a Springer but still very sensitive when it comes to being reprimanded. He (usually) obeys very well and loves to be worked. The longer he's outside, the better he likes it.

This fence is a very convenient setup, no wires required and surely keeps my dog within the limits we set. He knows what will happen if he exceed his space and will jump through a hoop of fire to avoid it.