I just wanted to comment on the invisable fencing. Please consider getting a backup fence, if you haven't already. I used invisable fencing for 2 years with never a problem, then I got another system for our new home, and within a week it failed. I lost my beautiful little girl to a car as a result. I know that you adore your dogs, and how heartbroken you would be if something happened to one of them. Please don't trust these systems completely.