I am converting part of my old garage to a coop. There are two sections. The coop section has its own garage door and a separate door to the other part of the garage. But, I just realized tonight that the rafters are open from one section to the other. And the non-coop section has no garage door. So, in case I'm not being clear, a raccoon could enter the garage, but the only way to access the coop portion wood be to climb up the walls and over into the coop. They are probably 12' high. Should I cover those areas with fencing?