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I have 3.8 acres of open ground and I want to let him run anytime. So I'm looking for a under ground fence for the 3.8 acres and I want to be able to use the same system to be able to reinforce him. Also be able to use the system when hunting. And hiking
Those fences are great for keeping your pup from taking off and getting lost and for keeping them away from the road.
I don't recommend leaving your dog unsupervised while outside, even with an efence, wood fence, chain link fence, etc.
I never understood the arguement that efences don't keep others from coming into your area. Thats not their purpose.
I use the innotek contain and train.