Another item under the versatility of millets:

Sorghum already has a larger grain than other millets (aside from adlay or Job's tears), but there is research on feed varieties with yet larger grains, designed to break during harvest to make nutrients more bioavailable for cattle.

"Nevada Researcher Aims to Improve Sorghum Hybrids for Dairy Cattle Feed," by Emma Lande, Nevada Today, 20 Nov. 2023 https://www.unr.edu/nevada-today/news/2023/yerka-sorghum-seed

Thi research is the project of Dr. Melinda Yerka, Assoc. Prof. of Agriculture, Veterinary & Rangeland Sciences at the University of Nevada, Reno.

The sorghum varieties in question are also bred for the drier region west of the so-called sorghum belt.

Apparently this is part of a much larger research program involving 200 varieties of sorghum:

"Sorghum Varieties Developed For Dairy Feed and Gluten-Free Human Nutrition," Seed Today, 4 Feb. 2025 https://www.seedtoday.com/article/1074280/potential-game-changing-sorghum-varieties-developed-for-dairy-feed-and-gluten-free-human-nutrition

I understand from Joni that among the varieties Dr. Yerka is working on is one that is "waxy."