Drought-stressed, nitrate-laden corn has caused cattle deaths. That’s all the more reason producers should check nitrate levels of such forage before feeding it.
In other states, there was one report of 36 dying and another of 16 dying. When all or a large portion of a pen is dead, that’s often times a pretty good indication that the cause was nitrate poisoning, because there isn’t much else that will kill a whole pen of cattle.