University of Kentucky College of Agriculture

Welcome to the Master Grazer Educational Program

-an educational program to improve grazing practices in beef, dairy, goat and sheep herds


Grazing News Articles

Articles on forages, animals, and grazing systems

Additional Resources


Extension Publications


Enter your E-mail to receive the monthly Grazing News Newsletter:


Master Grazer Educational Program reports to KY Ag Development Fund Board:

2015 Third Quarter Report
2015 Second Quarter Report
2015 First Quarter Report
2013-2014 Bi-annual Report
2012 Annual Accomplishments
2011 Annual Accomplishments




Austin Sexten

Master Grazer Coordinator
804 W.P. Garrigus Building
University of Kentucky
Lexington, KY
(859) 257-7512

Faculty Coordinators:

Dr. Ray Smith

Extension Forage Specialist
University of Kentucky
Phone: (859) 257-3358
Fax: (859) 323-1952  

Dr. Donna Amaral-Phillips

Extension Dairy Cattle Specialist
University of Kentucky
Phone: (859) 257-7542
Fax: (859) 257-7537  

Dr. Jeff Lehmkuhler

Extension Beef Cattle Specialist
University of Kentucky
Phone: (859) 257-2853
Fax: (859) 257-3412  


Prussic Acid Poisoning This Summer



Grazing forages during the summer months is a great way to reduce stored feed costs. However, there are some risks that come with grazing certain forages and weeds. It is important to be cautious this summer to reduce the risk for prussic acid poisoning, as prussic acid poisoning tends to be worse during times of drought.


Prussic acid poisoning occurs when plants such as sorghum, sudangrass, sorghum-sudan hybrids, Johnsongrass, wild cherry, and others contain cyanide-producing compounds. Wild cherry and Johnsongrass have much more risk than the other forage species listed above. If large amounts of these forages are consumed, especially after frost or during severe drought, then prussic acid (cyanide) is produced and interferes with oxygen utilization and livestock can die from respiratory paralysis. Symptoms appear quickly after the forage is consumed. These symptoms may include cherry red colored blood, staggering, labored breathing, spasms, foaming at the mouth, falling, thrashing, severe convulsions, and death. If an animal is seen showing these symptoms, seek immediate treatment for these animals by a veterinarian.


To reduce the risk of prussic acid poisoning, consider some of the following management tools: