Good morning. I have an oak tree in my hard. It has been dropping branches since I moved in 3 years ago. It began with small branches about half an inch in diameter. They began to get larger, up to 2-3 inches in diameter. Most of the branches that fell were dead, with no leaves. Last week, I have had two large branches, with leaves, break off the tree, they were between 3-6 inches. I have also noticed the tree routinely turns/curls its leaves upside down. I don't use any chemicals in the back yard and have left the exposed routes untouched.