I have an 8 foot privacy fence and due to the extremely dry winter, the ground has contracted. My fence has begun to sway and I am concerned that the posts are not stable. I can lightly shove on it and the posts literally move a good 2-3 inches. The posts are steel and the fence is cedar. The posts are set in cement, but i would like to add more to them to stablize the fence. I have already done two of them by digging out around the post about 2 feet down and sloshing a bag of Quickcrete around them, then covering the holes back with dirt. It is hard work, but it seems to work. Am I doing the right thing or does someone else have a suggestion for me? Thanks for any advice.