I'm new to the site/forums and have a mesquite-related question. I've "inherited" 2 mesquite trees in my recently moved-in front yard. I'm guessing the trees are less than 5 years old and stand about 9 feet high with canopies starting at 6 ft from the ground. I'm interested in pruning these to promote a more vertical shape (and higher canopy line). Is it safe to cut one of the limbs that forms a "Y" at 3 feet from the ground, and may I remove a second "trunk" growing right next to the base of one of the trees?