when pruning apple trees, some say 10% others say 15%, --now being i dont have pictures of trees in question this is a difficult ? to ask, how much do you take off, okay let give a lil info, these tress havnt had anything done to them in about 15 +/- yrs or so. there are some suckers (on some) that are about 10 - 12 ft in height, do you take off suckers first or just some. at a time. for example two of them are roughly 12 ish feet in diameter, @ top with limbs and leaves. the majority of tree is/has taken over by suckers. Do these need to be all cut? ---other question is, what happens when you over prune the tree? thanks for any help( which is greatly needed )