Animals are different from spots. The spots help you to focus your attention to the middle. The animals diffuse your attention all around. I just shot in a 42 target 3D tournament today, and I can guarantee you that I would have shot a better score on bullseyes. For one thing, you can miss a bullseye in any direction and still get a score. On a 3D range, some targets are wide but have very little high/low tolerance, while others are upright but have very little left/right tolerance. Others are at angles. Plus some of the targets don't have very good backstops, and the chance of a lost arrow nags at your mind. Altogether a very entertaining, if humbling, way to spend a day.