I think when I come to the barn, I'm often thinking about the last time I was there - perhaps thinking of trying to recreate the mood, or continue something we were doing. It can take me a while to adjust to the new mood of the day. Obviously the horses remember the past - an awareness manifested by fear or trust or anticipation - but they are always already slotted into the new day.
Here's the tractor barn. I like images of portals.