This maple tree was planted almost four years ago by Valley View where we bought the tree. The branch that hangs low on the right side is annoyingly low and gets in the way when my husband mows the law. At the end of summer, the local deer ate all the leaves off that branch. We would like to trim the branch. Is there a proper way to trim it closer to the trunk? PS: The frame around the trunk is to keep the local deer from further damaging the trunk. The trunk is healing nicely now after serious damage from deer.