After the deaths of the horses at the Beutler Ranch, the rodeo will continue in Elk City

He said horses cannot tolerate the chemical, adding that it does not take much to kill them. It is unclear exactly how many horses died in the incident, but news outlets are reporting between 40 and 70.

State agriculture authorities examine Beutler horses and warn horse owners to check feed

The Oklahoma Department of Agriculture, Food and Forestry and the Kansas Department of Agriculture are investigating the matter because the feed comes from Kansas.

In a recent statement, Hall urged livestock and pet owners to check labels on feed products and contact a veterinarian if they have any questions about the safety of their food.