Bats are very very good!
Yes they can be harmful to humans if you are bitten or bitten by fleas that were on the bat. Exspecially a dead bat, should never be handled with bare hands. But getting rabbies from a bat is rare. They are much more of a help then a bad thing. The greatly reduce the local bug population where they live. As long as you don't have foot deep quno in you shop or the area surrounding youe shop and chincken coop I would not be worried. If you want them out the best thing to do is to purchase a bat house or plans to build a bat house. Some times you can even get local highschool kids in FFA to build one and hang it for you as a school project. This is the most humain way of removing them. If you go this route you should watch to see where they are flying out from and them place the bat house within ten feet of that area on a neighboring tree, post ect. It will take time for them to move and some times the just completely refuse to. But it creates the best of both worlds no bats in the shop, but they are still around to eat all the flying bugs.
