Night watch, no witnesses.
He trusts the hay. Nobody standing near it.
At 2:13 every morning, Sus Bull walks the south fence and counts the feed sacks twice. One sack always leans left. He has questioned the wheelbarrow, checked the trough for aliases, and placed the bent straw under quiet observation. By sunrise, the barn is cleared. The straw is not. Nobody knows what he suspects, including Sus Bull.
The barn agrees on six things.
Sus Bull remains unconvinced.