More than likely, the horses were fixed with manure and urine catch bags, similar to those used with carriages. Additionally, though, horses very rarely defecate or urinate while moving faster than a walk, which may be the benefit of having them trot, instead
Sheaves of wheat is the term you were looking for. My grandfather was still using that method in the early 1900's. He knew how to tie a sheaf of wheat very rapidly. He also used a scythe to cut it. I grew up using scythe's to cut wheat in the tight corners of the wheat field wheat the combine coudn't reach.
I love this channel and the vlogs you post. As an agricultural historian, however, I was really disappointed in the lack of correct terminology used in this vlog.
I was thinking the same, but the wheat is still protected in that shell when the horses are trotting over it, finally maybe the final product was washed in water before it was used in a recipe for dinner
Thank you for this video!!! I visited Mount Vernon on Friday and because of the heat and humidity we ended up missing this barn. Thank you so much for showing me what I missed. 😁