I have a large 36” or more mulberry in my back yard with lots of dead limbs. I’ve been cutting them for firewood this winter! What do I do to try and salvage the tree? Do I need to nub it back to where there is no dead left? There wouldn’t be much tree left! Seems the main trunk is great and I could save 5 ft or so of 4 of the large branches. My home had been abandoned before I purchased it during a drought and I belive the drought got the tree, but I’m not really sure.