I have a Doug fir in my back yard that is now the only tree of that size in the neighbourhood. I (and my neighbours!) are growing somewhat concerned about the tree, given the significant winds that have been occuring over the past few years. It has also dropped a number of large branches during the wind storms. I had a spiral prune done to it several years ago, but I am worried now that as it is on its own it might go over. Suggestions have been made to top it, but I think that is ill-advised. Does anyone have any suggestions as to how I can deal with my tree?