Soybean poisoning is a cumulative disease. After 50 to 70 days on soybean feeding there occurs in some animals hemorrhages from mucous membranes resulting in passage of blood from body openings. This is accompanied by high fever which may range up to 109°F. Death follows the onset of symptoms in two to five days.
"A Case of Suspected Soybean Poisioning,"
Iowa State University Veterinarian: Vol. 12
, Article 7.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol12/iss1/7