I'm new to this website. I have a pink dogwood about 30 years old. This year it has started dropping quite a bit of brown sticky sap. This is the first time I remember this happening. In the last 5 years I've been trimming a lot of dead wood off tree and have flowers opening now on maybe half the branches. The squirrels give it quite a hard time and in the Fall attack the red berries. Does anyone have any ideas what's happening? I'll be devastated if it's on the way out.