Bovine Plasma. All blood samples were collected under the direct supervision by the veterinarian of record where a valid Veterinary Client Patient Relationship existed within the herd or feedyard. More details on the handling of livestock and collection of blood samples can be found in Supporting Information. Control bovine plasma samples were collected from control crossbred Angus calves (bulls and heifers) that were on pasture with their dams >90 days with no access to any distillers grains coproducts or liquid feeds. Plasma samples of three test groups were collected from crossbred Angus steers that were on feed in private feedyards with 19-38% of CWDGS and 0-6% of LF (Table ). All plasma samples were stored at -80°C until assayed.