10/21/2026
Recent rains may have greened up pastures, but they can also increase the risk of prussic acid poisoning in cattle and horses. Young regrowth of Johnsongrass and other sorghum species may contain dangerous levels of compounds that release prussic acid, especially after periods of drought followed by rainfall.
MU Extension specialists recommend avoiding grazing on these forages until plants reach about 24 inches tall and feeding hay or grain before turnout so hungry animals are less likely to consume large amounts of potentially toxic forage. Clinical signs can appear quickly and may include rapid breathing, muscle tremors, excessive salivation, staggering and collapse. If poisoning is suspected, contact your veterinarian immediately.
Get more info: https://brnw.ch/21x6w0a
Missouri Department of Agriculture
Missouri Farm Bureau
MFA Incorporated
Missouri Beef Industry Council
Missouri Cattlemen's Association
