Have you used Wireless dog fence?

"I would be devastated if my dogs got killed by a bigger dog. I was just wondering, why would he threaten to kill your dogs and YOUR HUSBAND if it happened again?"

I think he was too much of a gentleman to threaten a lady!

I think with the citronella, you would need to activate it remotely as the dog was leaving the property. My dog was very good at sneaking out of sight which is why the electronic fence seemed to be my only option.