I am putting myself into the mind of the rabbit for a moment...
"Ah, I laugh at your fence. Do you not know that I can dig a tunnel under your fence. Ha! Wait until you see my warren; it will be beautiful with several chambers and I will have many, many children to torment your dogs."
Okay, I am back to being just plain greene again. I wish you could see the yards here that are full of holes. The rabbits have at least 3 or 5 entrances they can escape into when they are being chased. Do a Google Image search for 'rabbit warren' and you will get an idea of what you are up against. One of my neighbors commented to me the other day, "Did you see how fast they can dig?!!"