Temperatures 80 and warmer, coupled with high humidity and sun light radiation cause problems. Adequate shade or access to wooded areas is needed for protection from the sun. Provide ample, cool, clean drinking water, and, if necessary, spray water on the animal to cool them. Aflatoxin causes considerable problems for beef cattle. High aflatoxin levels reduce growth rates.
Calves are generally more susceptible than cows.
In severe cases, aflatoxin poisoning can cause liver damage and depress the immune function. When in doubt, have grains analyzed before feeding. Internal and external parasite control will reduce the stress and nutritional needs of the animal. Treated now will also reduce the stress in the fall. Tax issues and drought.