Help! I have a pine tree in front of my house. A week ago i came home from work and there were a bunch of healthy branchs from the tree lying on my walkway right under the tree. Each one had a perfect angled cut. The angle of the cut was the same on every brach. They were clean perfect cuts. It was really weird. I picked them up and put them aside. Then today when I got home, there were all fresh cut ones on the walkway. All with the perfect little angled cuts.

What is doing this to my tree? Anyone know??