MOST of the time bats are not to be shot because many are protected in many locations even in Michigan. (Reading the regulations, I find it is probably legal to shoot a rabid bat. This is most likely because, as you correctly note, they are extremely hard to hit.) MOST of the time, people here are reasonably well informed and take the time to read through a thread. MOST of the time, it would be wise to have an informative heading or topic sentence to explain why what you are doing is different than might be the norm. You needn't leave so please reconsider and we'll all take a lesson from this experience.