blaster, it may just reinforce the charging and barking since every time the dog charges, it will get shocked. Some dogs associate the shock with the object they're charging, and then that object becomes even more of a threat to them, so the charging actually increases in frequency.
These fences are also not highly recommended for dogs with high prey drive--I know of hunting dogs that got so focused on a squirrel or rabbit outside the electronic fence, that they blow right through it to chase.
Also, if I'm remembering right (and my memory being so poor, I'm likely wrong
) you mentioned in another thread that your dog was showing some aggression toward people in your yard? Remember that an electronic fence will not
keep other dogs and people out of your yard.
So an electronic fence might not be your best bet. Just my