Bless your heart. I know what fear you must have been feeling. They can give you a heart attack. That's the terrier in them. I would really suggest fencing the back area. That way you could all relax and enjoy the back decks and yard, too. That's the only suggestion I have. That's the first thing we did after our house was finished. Called a man and had two areas fenced, so we could open the back door and that was their freedom. Ours have loved that yard and each has spent so much time out there that it is unbelievable. They were all very possessive of it, too. Those darn birds better not light in their yard or they'd get chased away pronto!