On shock collars.

I had the shock collar fence to keep my dogs in the yard in Montana. My dogs are rat terriers and I use them for squirrel or rabbit killing, no not hunting, killing.

My dogs knew the boundary of the fence and would not tread closer. Except my big male. If he saw a squirrel or a rabbit it didn't matter where it was he was after it. He would hit the range of the shock collar fence let out a yip and keep on going. When he was through with the critter he would come back to the fence outer perimeter and sit with his ears drooping and his head hanging and whine. That is the only time that dog ever whined and that is the only time he ever tempted that shock collar.

I started my dogs early with their training. A loud NO! means stop what ever you are doing right now. They will even reluctantly stop chasing squirrels and rabbits. They were all trained using the lunge line and choke collar. NO! BAD DOG! means go hide somewhere the Boss is getting the lunge line out for retraining.