Yes , do something for a rodent stop. I stapled tyvex between posts and to purlins, then placed vertical studs and batts between studs then I used cdx and several coats of paint. The tyvex helps stop air infiltrating in and around batts.
I spaced mine 6" apart ,but pulled them back away from door about a foot. placed insulation at outside edge of bldg. and had it down a bit to cement over and a crack groove over it.