You're lucky if you've got 3 acres. I've got a pretty big garden so they are now confined to half of it. When the half they are not in has recovered a bit, we'll swap. Once we've got it into full recovery, they can have the run of the whole thing until Autumn. If it gets really wet, they'll be confined (don't get me wrong, they still have lots and lots of room to run around). the only reason we've had to shut them in is that it was so wet for so many months, the whole thing turned into a mud bath. We need to get things growing again a bit.
They really are spoilt girlies. Unless the do a raid on my polytunnel and then mummy shouts.