If you target 1 animal, shoot it, but it cant reach you, then try and shoot another animal, every time the first animal moves, your accuracy meter will drop even thought you are no longer aiming at that animal.
so basically if you switch animals to players.... you can see how this totally screws over a archer. as if your in a group battle your gonna be screwed if your engaged with multiple targets, regardless if the target your actually trying to attack is not moving.