Last week we got a brief reprieve from the heat wave and the mice came back to party in one of my lofts. They ran across the compressed Timothy and pooped a lot. They love eating the Timothy seed heads.
I noticed that they clearly spent more time on the bakes that had flat compressed sides up versus the cut sides, which in this particular hay are very sharp ended (much more than regular hay).
This got me wondering if there was a type of fabric or something I could toss over hay to discourage mice feet. In winter I tarp which works somewhat but they can still get under tarps to some extent.