I once, naively, shot at three eighths inch thick steel targets with a deer rifle from about a hundred yards. When I heard no characteristic "clang" I thought I missed. Upon inspection, the round passed through the steel cleanly, without so much as a burr on the exit side of the target. Kevlar doesn't stand a chance.
That explains why you never see deer wearing them.
EX-actly right. Until this article I thought EVERYBODY knew that!